Ebb Mst30 & Mst155m Series32

MST30 & MST155M Series

Multi Service Transmission Equipment

User Manual

Beijing Easy Broadband Technology Co., Ltd

Version: V1.1

1

Limitation of Warranty

The foregoing warranty shall not apply to defects resulting from

improper or inadequate maintenance by Buyer, Buyer-supplied firmware or

interfacing, unauthorized modification or misuse, operation outside of the

environmental specifications for the product, or improper site preparation or

maintenance.

General Safety Precautions

Transportation, Installation and Operation

Avoid excessive vibration and shocks.

Avoid contact with water, dust, and dirt.

Avoid excessive direct sunlight.

Ensure sufficient cooling.

Prevent loose items from falling into the device.

Main Powers

Disconnect the power cord before opening the device.

Use exclusively the supplied power supply the approved power cord.

The power plug must be plugged into a properly grounded receptacle. An

improperly wired receptacle could place hazardous voltage on accessible

metal parts of the device.

The mains supply must match the power specification of the device.

Replace blown fuses exclusively with fuses of the same ratings.

Do not work on the equipment during periods of lightning activity.

Technical Support

Before contacting with your support representative, please prepare to

provide the complete serial number of the affected unit (refer to the

according unit label).

2

INSTRUCTION FOR SAFTY USE

MST30 & MST155M series of optical modem within the scope of design

and use are characterized by well-reliable function, however, which should be

avoided damaging and destroying optical modem through human activity.

To read through the manual carefully and preserve the manual well to

give a guide and help in the future;

To prevent the equipment from close to water or wet ground;

To ban from laying any things on power or cable or making the cable

tying or covering ,and then lay down the place being not vulnerable to touch;

Power plug and other equipment joint parts ought to connect stably each

other and keep regular examination.

To be sure to take carefully to connect the lines under the mark of

connecting pole when the power line is linked, the using power must be

comply with the below principles:

1. Direct current -48v type: -36 --- -72v

2. Alternating current 220v type: 220v±20%,50 hz

To keep paying attention to clearing equipment and may use

soft-and-cotton cloth to brush at necessary time;

3

In these cases, please turn off the power immediately and timely keep in

touch with our company:

Water invades equipment.

Equipment with damage or the damage of shell;

Equipment with working failure function or the quality for show with

complete change;

Equipment to come out scent, smoke or noise.

Please don’t to fix equipment in personal, unless with the exception of

definite indication in manual.

4

CONTENT

1 Overview .............................................................6

1.1 General ................................................................. 6

1.2 Features ................................................................ 8

1.3 Principle ............................................................. 10

2 Installation .......................................................12

2.1 Unpacking .......................................................... 12

2.2 Equipment check............................................... 13

2.3 Equipment installation...................................... 13

2.4 Equipment testing ............................................. 14

3 Feature .............................................................15

3.1 Indicators ........................................................... 15

3.2 Dial-up switch .................................................... 28

3.3 Maintenance....................................................... 34

4 Troubleshooting ...............................................40

4.1 Optical LOS Alarm ........................................... 40

4.2 E1 alerting.......................................................... 40

4.3 Peer terminal alerting ....................................... 41

5

4.4 High bit error rate............................................. 41

5 Interface ...........................................................41

5.1 Electric features of E1 interface: ..................... 41

5.2 Optical interface features: ................................ 42

5.3 Manage interface and extend port features: ... 43

5.4 Ethernet interface features:.............................. 44

5.5 Electric features of V.35 interface:................... 45

5.6 Power Supply ..................................................... 48

5.7 Working Environment ...................................... 49

5.8 Dimension........................................................... 49

6 Application .......................................................49

7 Appendix...........................................................52

6

1 Overview

1.1 General

The Optical transmission MST30 Series optical transmitter and

receiver is manufactured by the special integrate circuit which is

developed independently by EBB company. It amalgamates standard

traditional 2M TDM service interface, V.35 service interface and

10/100BaseTx ether data service interface, and changes them into high

speed light signal which can be transmitted through optical fiber. The

customer can choose E1,V.35,10/100 BASE-T interface which applies to

lower capacity switches topology, circular network, mobile telecom base

station, private network, DDN, etc based on his own needs.

MST 30A is 1*E1fiber optic modern;

MST30AV is 1* V.35 fiber optic modem, V.35 interface supports

Nх64K(N=1~32);

MST30AE is 1*10/100M Base-Tx fiber optic modem, Ethernet

data transmit in E1;

MST30CE is 4*10/100M Base-Tx fiber optic modem, Ethernet

data transmit in E1;

MST30VE is 1*10/100M Base-Tx+1*V.35+1*V24 fiber optic

modem, Ethernet and V.35 data framed into E1 and transmits, V24 data

can use E1time slot or not;

MST30CVE is 4*10/100M Base-Tx+1*V.35+1*V24 fiber optic

modem, Ethernet and V.35 data framed into E1 and transmits, V24 data

7

can use E1time slot or not;

With easy maintenance, immediate start as soon as power

connected MST30A, MST30AV, MST30AE, MST30VE, and

MST30CVE optical transmitter and receiver can also provides

centralized frame structure, and integrated network management

function.

MST155M/C multi-service transmission equipment is manufactured

based on our proprietary purpose-built integrated circuits. It integrates the

traditional 2M E1, 10/100Base-Tx (max bandwidth: 100M), and N×64K

V.35 services in one equipment so that it can operate both high-speed

digital service and traditional TDM service in one pair of Fiber.

KMST155C is centralized rack equipment, and is manufactured

based on our proprietary purpose-built integrated circuits. It integrates the

traditional 2M E1, 10/100Base-Tx (max bandwidth: 100M), and N×64K

V.35 services in one equipment so that it can operate both high-speed

digital service and traditional TDM service in one pair of Fiber.

MST155M/C multi-service transmission equipment can also provide

centralized rack structure for easy maintenance as well as plug and play,

and at the same time, provide complete network management functions.

Model Optical E1 V.35 Ethernet RS232 MGMT Structure

MST30A 1 1 1 YES Mini desktop

MST30AV 1 1 1 YES Mini desktop

MST30AE 1 1 1 YES Mini desktop

MST30CE 1 4 1 YES Mini desktop

8

MST30VE 1 1 1 1 YES Mini desktop

MST30CVE 1 1 4 1 YES Mini desktop

MST155M 1 1 1 1 1 YES Mini desktop

MST155MC 1 1 1 4 1 YES Mini desktop

KMST30A 1 1 1 YES

Centralized plug-in

card

KMST30AV 1 1 1 YES

Centralized plug-in

card

KMST30VE 1 1 1 1 YES

Centralized plug-in

card

KMST155M 1 1 1 1 1 YESCentralized plug-in

card

KMST155C 1 4 4 YESCentralized plug-in

card

1.2 Features

MST30A and KMST30A can both provide one E1 digital interface,

impedance 75Ω/120Ω;

MST30AV and KMST30AV can both provide one N×64K V.35

interface (N= 1~32);

9

MST30AE provides one 10/100Base-Tx and MST30CE four

10/100Base-Tx self-adjusted Ethernet interfaces respectively,

bandwidth 2M;

MST30VE and KMST30VE both provide one N×64K V.35 interface,

at the same time, can provide one 10/100Base-Tx self-adjusted ether

interface, bandwidth 2M;

MST30CVE can provide one N×64K V.35 interface (N = 1~32) and

four 10/100Base-Tx self-adjusted ether interface simultaneously,

sum bandwidth 2M;

MST155M,KMST155M provide one E1digital interface, impedance

75Ω/120Ω, one 10/100Base-Tx self-adjusted ether interface, (can be

adjusted by 0.5M and the max bandwidth 100M) + 1* V.35

route(N*64K, speed can be varied);

MST155MC provides one E1 interface impedance 75Ω/120Ω, four

10/100Base-Tx self-adjusted ether interface, (can be adjusted by

0.5M and the max bandwidth 100M) + 1* V.35 route(N*64K, speed

can be varied);

Except MST155M,MST155MC,KMST155M, E1, V35 support set-in

BERT(Bit Error Rate Test);

MST155M,MST155MC,KMST155M support E1 interface and V.35

interface switching;

KMST155C provides four E1 interface, 4 Ethernet interface(can be

adjusted by 0.5M and the max bandwidth 100M)

V.35 interface provides seven kinds of clock module (DCE: native,

reversion, outer input; DTE: RC transmitted and TC received, RC

transmitted and RC received, TC transmitted and TC received, TC

transmitted and RC received), adapted to the requirement of all V.35

10

interface clock module in the present market;

The V.35 interface clock module, phase, time slot selection function

can be set by means of the network management software;

Provide one RS232 asynchronous data interface, max rate is 19.2K;

Provide one management interface, realizing centralized monitor and

supporting system update;

Provide a group of control switches, used for setting the test of

equipment maintenance;

Adjust to many types of power supply environment: +24VDC,

-24VDC, -48VDC or 220VAC;

1.3 Principle

Ethernet, V.35 and V24 data input by MST30A Fiber Optic

Modem transfer into single E1 data . The tributary clock is selected

by special centralized chip, and signal decoding is connected again

to code flow of drive light signal after code speed adjustment.

When entering light receiver, the receiving side light signal is

transmitted into special centralized chip by balanced magnifying

and NRZ signal generated by refreshing circuit for clock selection

and decoding. It recovers as 2048Kb/s signal through code speed

restoring circuit and inner digital locked loop circuit smoothing;

transfer into Ethernet, V35,V24 data then output.

11

Figure 1.1 Principle Frame

The code type of 2048Kb/s (E1) data signal input

transmitting equipment is HDB3, which is changed into monopole

code by single and double switching. The spur track clock is

selected by special centralized chip, and signal decoding is

connected again to code flow of drive light signal after code speed

adjustment. The signal of 10/100Base-Tx transfers into MII

interface data through PHY, then sent into special centralized chip.

Meanwhile the signal is connected again to code flow of drive light

signal after code speed adjustment. Then send by drive circuit and

fiber.

When entering light receiver, the receiving side light signal is

transmitted into special centralized chip by balanced magnifying

and NRZ signal generated by refreshing circuit for clock selection

and decoding. It recovers as 2048Kb/s and MII signal, through

output circuit transfer HDB3 and 10/100Base-Tx signal required

the interface need respectively.

12

Figure 1.2 MST 155M/MST 155MC principle

2 Installation

2.1 Unpacking

1) Fix the installation position of the equipment, clean it up

and move the paper box with the equipment in it near this

installation site.

2) Pay attention to the direction of packing case, ensuring

right up side.

3) Open the box and take out the equipment and accessories.

The equipment is packaged by special box with

anti-vibration protection. There is one machine in each packing

13

case, including corresponding accessories. Please remember to

examine and check whether it accords with packaging sheet.

【 There is precision instrument inside the equipment, please

carefully load and avoid excessive vibration lest affecting the

equipment performance. If you find it damaged or losing any part

during transportation, please notify the company service department

so that we can settle it adequately as soon as possible.】

2.2 Equipment check

Check whether the equipment is intact and damaged or not, and

verify the power condition.

2.3 Equipment installation

1) Take out the equipment, check whether the equipment is

damaged. Fix it to the frame or other device to make sure

that it is stably fixed.

2) Select the input power according to the equipment

arrangement, and connect the power line correctly. Check

whether the power supply is normal when powered on (the

green indicator light POWER shines if the power is

normal), whether the working condition is normal （the

green RUN light glitters） . If the optical fiber is not

14

connected, the light module working indicator light WORK

(green) does not shine and the synchronous lost indicator

light SYNL (red) shines.

3) Connect the optical fire linked to peer equipment, the light

module working indicator WORK (green) shines in normal

condition and the SYNL (red) extinguished; if it is not

normal, please check whether the light channel is normal,

the end fiber can receive and transmit and the peer

equipment is powered.

Connect the E1 signal line, if the side equipment of the customer

can work adequately, the WORK (green) light corresponding this

E1 signal shines, AIS (yellow) light extinguished. As the method

of making E1 signal line, please refer to appendix 2.

2.4 Equipment testing

1) Power supply: connect the line of the power supply

correctly, turn on the power, the power light (Green) should

be on, which indicates that the power works properly. (The

method of connection of DC power please refer to

appendix 3)

2) Equipment operation: When the power is on, the equipment

undergoes initialization; when the RUN light (Green)

twinkles, it shows that the equipment operates normally;

3) Fiber Interface: When the equipment operates normally, use

tail fiber to circulate the fiber interface. If the work light

(Green) of the light module is on and the SYNL(Red)is off,

15

it indicates that the fiber interface works properly.

4) E1, V.35 interface: When the equipment works properly,

make the fiber interface self-loop-back, use error rate

measuring equipment to test E1, V.35 interface, no error

rate indicates normality.

5) Ethernet interface: When the equipment works properly,

use two computers which have net-interface card, to

connect the Ethernet interfaces of the equipment. Ping the

two computers to test whether the receiving/sending packet

is correct.

6) RS232 interface: When the equipment works properly,

make the fiber interface self-loop-back, connect the RS232

interface with PC Serial-Ethernet, operate the “Super

Terminal”in the PCs (9600bit/s), forbid to choose ECHO

of the local character, key in the testing characters, the

received characters will be shown in the window. If they

are the same as the key-ins, it shows that the RS232

interface works properly.

3 Feature

3.1 Indicators

MST series optical transmitter provides a complete

emergency alarm report and situation instructions. If the red light

16

is on, it means serious alarm and the system couldn’t work

normally. If the yellow light is on, it shows there are some alarms,

while the system basically works ok. And the green light shows

the system works properly. The detailed definition of each

instruction light is as follows:

Fig 3.1 Sketch Map of MST30A Front Side

Fig 3.2 Sketch Map of MST30A Back Side

Fig 3.3 Sketch Map of MST30AV Front Side

17

Fig 3.4 Sketch Map of MST30AV Back Side

Fig 3.5 Sketch Map of MST30AE Front Side

Fig 3.6 Sketch Map of MST30AE Back Side

18

Fig3.7 Sketch Map of MST30CE Front Side

Fig 3.8 Sketch Map of MST30CE Back Side

Fig3.9 Sketch Map of MST30VE Front Side

19

Fig 3.10 Sketch Map of MST30VE Back Side

Fig 3.11 Sketch Map of MST30CVE Front Side

Fig 3.12 Sketch Map of MST30CVE Back Side

20

Fig 3.13 Sketch Map of MST155M Front Side

Fig 3.14 Sketch Map of MST155M Back Side

Fig 3.15 Sketch Map of MST155MC Front Side

21

Fig 3.16 Sketch Map of MST155MC Back Side

The alarm instructions of the table-top equipment

Definition Proper Operation Loop-back BERT

POWER

(Green)

If the power supply is

normal, it is ON

RUN

(Green)

Under the status of

dial-up control, it is

sparkling. (On 1/4

second + Off 3/4

second, repeated);

under the status of

network management

control, it is

sparkling.(On 3/4

second+ Off 1/4

second, repeated.)

STA (Yellow) On=frame E1 remote

alarm

Flash with RUN in

It sparkles if not in

simultaneity. It is off if

there is no error code

22

phase = local E1

warning

Flash with RUN

reversely= remote E1

warning

under the simultaneous

status.

The light is on if the

error code<10-3, the

light is sparkle if the

error code > 10-3

and maintain the most

serious error code

status after becoming

simultaneously.

SYLOS/1E-3(Red) On when optic LOS

or the error code >10-3

Off if the data from

the fiber interface is

normal

1E-6 (Yellow) On when the error

code of the fiber

interface>10-6

Off if the data from

the fiber interface is

normal;

The light

sparkle loop-back①

Sparkle with

RA in the same time

①

(OPT)WORK

(Green)

On if the fiber

receiving power is

normal

RA (Yellow) On if the light of the

peer interface

disappears or LOS

Sparkles

loop-back this

equipment①

Sparkles with

1E-6 in the same time

①

23

(E1)WORK

(Green)

on while connection,

off while

disconnection.

Sparkles if there

exists loop-back in E1

local equipment

Sparkling indicates

receiving test code

from the local

equipment which

corresponding with E1

interface

AIS (yellow) On when E1 receives

AIS

Sparkles if there

exists loop-back in E1

peer equipment

Sparking indicates

sending test code from

the local equipment

corresponding with E1

interface

FSL Works under the

frame method. On if

the 2M frame losses

simultaneously

Sparkles from the

peer equipment

Sparkling indicates

receiving test code

from the other

interface

corresponding with

local interface

TD Sparkles when the

V.35 interface

sending data

RD Sparkles when the

V.35 interface

receiving data

ULK On if sending data

from V.35 is not

match with the set

clock mode

Sparkle Sparkling indicates

sending test code from

the other interface

corresponding with

24

local interface

10/100 Ethernet interface

bps: on=100M,

off=10M

L/A Ethernet interface

connecting status:

on=connection,

sparkle =there are

some data input

① can be used in MST30AE,MST30CE

25

Fig 3.13 Sketch Map of insert-card panel

The alarm instructions of the card-mode equipment

Definition Proper operation Loop-back BERT

P

(Green)

On when 5V power supply is

normal

R Under the status of dial-up

26

(Green) control, it is sparkling. (On

1/4 second + Off 3/4 second,

repeated); under the status of

network management control,

it is sparkling.(On 3/4

second+ Off 1/4 second,

repeated.)

ST

(Yellow)

On=frame E1 remote alarm

Flash with RUN in phase =

E1 local warning

Flash with RUM reversely=

other terminal warning

It sparkles if not in

simultaneity. It is off if

there is no error code

under the simultaneous

status.

The light is on if the

error code<10-3, the

light is sparkle if the

error code > 10-3

and maintain the most

serious error code

status after becoming

simultaneously.

SL (Red) Off if the data from the fiber

interface is normal; on if fiber

LOS or error code is 10-3

E6 (Yellow) On when the error code of the

fiber interface>10-6

Off if the data from the fiber

27

interface is normal;

(OPT)W

(Green)

On if fiber receiving power is

normal, otherwise, is OFF

RA(Yellow) On if the peer interface fiber

disappears or LOS alarms

(E1)W

（Green）

on while connection, off

while disconnection.

Sparkles if there

exists loop-back in

E1 local equipment.

Sparkling indicates

corresponding with A

A (Yellow) On when E1 receives AIS Sparkles if there

exists loop-back

from peer E1

interface

Sparkling

corresponding with

(E1)W

FS (Red) Works under the frame

method. On if the 2M frame

losses simultaneously

Sparkles if there

exists loop-back

from peer V35

interface

Sparking corresponding

with UL

TD (Green) Sparkles when the V.35

interface sending data

RD(Green) Sparkles when the V.35

interface receiving data

UL (Yellow) On if the sending data from

V.35 is not match with the set

clock mode

Sparkles if there

exists loop-back in

V.35

Sparkling

corresponding with FS

S (Green) Ethernet interface bps:

on=100M, off=10M

28

L (Green) Ethernet interface connecting

status: on=connection,

sparkle =there are some data

input

F(Red) On if fiber receiving power is

normal, otherwise, is OFF

Sparkles if

there exists

loop-back from E1

interface

Sparkling

corresponding with A

L(Green,

upside )

Ethernet interface connecting

status: on=connection,

sparkle =there are some data

input

Sparkles if

there exists

loop-back from peer

E1 interface

Sparkling

corresponding

with(E1)W

Console: connect with the management equipment in order to

have the management function;

E1, V35 interface is in the back of the equipment;

Switch: please refer to the actual dial number

3.2 Dial-up switch

Fig 3.14 Dial-up switch definition

OFF=1

ON=0

1 2 3 4 5 6 7 81 2 3 4 5 6 7 8

29

Dial-up switch is used to set the maintaining and testing functions of

the equipment. All the maintaining and testing functions could be set

through net management.

Dial-up 1, 2 (applicable to all equipments): maintenance and test

mode choice (OFF=1, ON=0)

00= project BERT Test

01= long-distance equipment loop-back, control the

long-distance equipment E1 interface fiber loop-back, the time

limit for the loop-back is one hour

10= keep by the factory

11= normal mode

Else dial-up settings

MST30AV, KMST30AV dial-up setting

Dial-up3: No definition

Dial-up4: V.35 interface CRC choice (OFF=1、On=0)

0=function

1=prohibition

Dial-up5: V.35 interface clock phase choices

0=opposite phase

1= same phase

Dial-up 6, 7, 8：V.35 clock interface clock mode

000=DTE Mode, in term of RC, sends TD, in term of TC,

collects RD

001=DTE Mode, in term of TC, sends TD, in term of TC,

collects RD

010=DTE Mode, in term of RC, sends TD, in term of RC,

collects RD

30

011=DTE Mode, in term of TC, sends TD, in term of RC,

collects RD

100= No definition

101=DCE Mode, V.35 External clock

110=DCE Mode, E1 Slave clock

111=DCE Mode, E1 Master clock

MST30AE dial-up setting

Dial-up 3: Ethernet lengthen choices

0=1536/1536；

1=1518/1522。

Dial-up 4: Clock choices

0=Recovery clock

1=Local clock

MST30CE Dial-up setting

Dial-up 3:4 Ethernet insulation function choices

0=function

1=prohibition

Dial-up4: Clock choices（OFF＝1、ON＝0）

0= Recovery Clock

1=Local Clock

MST30VE, KMST30VE Dial-up setting

Dial-up3: Ethernet lengthen choices

0=1536/1536

1=1518/1522

Dial-up 4: V.35 interface CRC Function choices（OFF＝

1, ON＝0）

0= Function

31

1= Prohibition

Dial-up 5: V.35 interface Clock Phase choices（OFF＝1,

ON＝0）

0=opposite phase

1= same phase

Dial-up6, 7, 8: V.35 Clock interface Clock Mode（OFF＝

1, ON＝0）


collects RD


collects RD


collects RD


collects RD

100=No definition

101= DCE Mode, V.35 External Clock

110=DCE Mode, EL Slave Clock

111= DCE Mod, EL Master Clock

MST30CVE Dial-up setting

Dial-up 3: Ethernet Insulation function choices（OFF＝1, ON

＝0）

0=function

1=prohibition

Dial-up 4: Clock Choices（OFF＝1, ON＝0）

0=Recovery Clock

1=Local Clock

32

Dial-up 5: V.35 interface Clock phase choices（OFF＝1, ON

＝0）

0=opposite phase

1=same phase

Dial-up6, 7, 8: V.35 Clock interface Clock Mode（OFF＝1,

ON＝0）


collects RD


collects RD


collects RD


collects RD

100=No definition

101= DCE Mode, V.35 External Clock

110=DCE Mode, E1 Slave Clock

111=DCE Mode, E1 Master Clock

MST155M and KMST155M Dial-up setting

Dial-up 1：E1 loop route choosing（OFF＝1、ON＝0）

0＝Test；

1＝Normal。

Dial-up 2：V.35 loop route choosing（OFF＝1、ON＝0）

0＝Test；

1＝Normal。

Dial-up 3, 5~8 are same with MST30VE。

Dial-up 4：E1/V.35 data route across（OFF＝1、ON＝0）

33

0＝E1 in route 2，V.35 in route1；

1＝E1 in woute1，V.35 in route 2。

MST155MC Dial-up setting

Dial-up 1：E1 loop route choosing（OFF＝1、ON＝0）

0＝Test；

1＝Normal。

Dial-up 2：V.35 loop route choosing（OFF＝1、ON＝0）

0＝Test；

1＝Normal。

Dial-up 3, 5~8 are same with MST30CVE。

Dial-up 4：E1、V.35 data route across（OFF＝1、ON＝0）

0＝E1 in route 2，V.35 in route1；

1＝E1 in woute1，V.35 in route 2。

（ K ） MST30AV time slot dial-up(only for MST30AV and

KMST30AV)：dial-up 0：ON E1 is framed mode and in that case

use switch 1-3 to choose the relevant time slot; OFF E1 is

unframed mode and in that case other dip switches are unable to

work.

Chart 5.19 Time slot dial-up

34

3.3 Maintenance

3.3.1 Dial-up switchMST30 series optical transmitter and receiver support loop-back, BERT

tests, etc. through net manger or dial-up.

Control method for maintenance test

Default dial-up switch is valid at ex-work.

Net manager can select “maintenance operation by

dial-up switch” or “maintenance operation by net

manager”.

When the maintenance test is operated by net manger,

“maintenance operation by net manager” shall be

selected.

Clear power-failure through the maintenance operation

set by net manger.

3.3.2 BERT Test TheoryThe simple error monitor built in the equipment can designate the data

channel for receiving and transmission through dial-up or net manger, the

indicator light on the panel can indicate the synchronized mode, error

rating in the error test (No error, <10-3, >10-3).

35

Fig 3.15 BERT principle

Project detect is designed for transferring and receiving the data in

regular condition.

3.3.3 Test processEngineering test refers to test, and the procedure is shown as below:

11 Confirm that the on both ends function normally, and place the

local-end dial-up switch at 11

Set the end-to-end equipment’s corresponding E1 port to loop

back in the optical direction, and move the dial-up switch from 11

to 01

The loop-back setup is valid when the indicator flickers (local

end AIS flickering)

Setup at the local-end E1 channel BERT, move dial-up switch

from 01 to 00

36

3.3.4 ConfigurationsAll the configurations of MST30 series and MST155 series can be set up

via the network management software and part of the configurations can be set

up by the dip switch. Customer can open/close the DIP function via the

network management software and factory default is DIP enable.

Chart 6.1 Set-up mode configuration

Default V.35 interface configurations of MST30AV, MST155M,

MST155MC, KMST30AV and KMST155M are shown on the Chart 6.4.

Chart 6.2 MST30AV、MST155M、MST155MC、KMST30AV、

KMST155M configuration

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Chart 6.3 DTE Mode V.35 configuration

Default Ethernet interface configurations of MST30AE are shown on the

Chart 6.4

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Chart 6.4 MST30AE Configuration

Ethernet interface configuration instruction:

Flow control: whether the Ethernet interface set-up supports 802.3x flow

control protocol;

Channel isolation: choose the channel in order to separate the Ethernet

channels;

Package size: select the Ethernet interface through the max package size;

Interface set up: can select work model of Ethernet interface, that is

self-negociation,10M half-duplex, 10M full-duplex, 100M full-duplex,

100,M half-duplex, also can control the interface use through selecting

“use”, o cancel to close the interface;

Priority option: can select ”high-priority transmit proportion” and

“high-priority interface”to set up high-priority Ethernet interface.

V.35 interface configuration instruction:

Model option: select DCE/DTE model through setup, clock parameter is

different in either model;

CRC option: whether E1 framed supports CRC verification;

Send the edge of the clock: can select the edge of the clock corresponding

the equipment connected with V.35;

DCE clock type option: can select the three kinds of clock, main

clock(Jitter Clock), slave clock(E1clock recovery), external clock(V.35

interface ETC clock);

DTE clock type option: can set up the clock in data sender and receiver

respectively;

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Time slot option: can select V.35 interface in transparent 2048K or framed

n*64k.

Note: These configurations should be made by specified configuration

software which can be asked for from our company or downloaded from

our website.

3.3.5 E1/V.35 data channel switch MST155M/C support data channel optional exchange of E1/V.35 so that

V.35 channel is easily corresponding to E1channel of remote equipment.

Network management may choose V.35 data, which take up original

channel model or choose regular E1 channel model to reach data channel

exchange of E1/V.35.

Channel across（factory default）

CH1 CH2

E1 ch2 V.35

active channel

CH1 CH2

V.35 E1 ch2

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4 Troubleshooting

4.1 Optical LOS Alarm

Check the connection between fiber and optical transmitter and

receiver;

Check if the transmiter/receiver fiber is oppositely connected;

Check the optical port of the device;

Check the optical link. Test the optical receiving power. If no

optical power, then exchange the receiving and transmitting fiber

with the corresponding terminal simultaneity and check.

4.2 E1 alerting

E1 interface WORK light is the operating light which should be

permanent on in normal status. AIS light is the alerting light when

receiving all 1 code.

WORK light is not on. Check if E1 port cable is properly

connected. Check the continuity and stretch of the connection cable.

Check if the connected client device is power on and works well.

AIS light on. Check the operating status of the connected client

device.

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4.3 Peer terminal alerting

If current terminal RA (Yellow) light is on, it means the corresponding

terminal receiving signal disappeared or synch lost. Check current

terminal optical transmitting signal and corresponding terminal receiving

signal. Check the optical link.

4.4 High bit error rate

Check if the interface impedance is properly set. If it is OK, please

connect the bit error test set to check by piecemeal, and then use POE

method to check if the error is coming from optical link or device itself.

5 Interface

5.1 Electric features of E1 interface:

Nominal rate: 2048Kbps，margin±50ppm

Interface code type: HDB3

Interface impedance: 75Ω (unbalanced) or 120Ω (balanced)

Electric features of digital interface: compliant with ITU— T G.703

recommendations

Jitter transfer performance: compliant with ITU-T G.823

recommendations

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Input Jitter tolerance: compliant with ITU-T G.823 recommendations

Output jitter: compliant with ITU-T G.823 recommendations

Level: ±2.37V±10% or ±3.00V±10%

Interface connector: BNC coaxial

Chart 9.1 Wave model of E1 line code

5.2 Optical interface features:

Transmission optical power: -3dBm～-8dBm

Receiving sensitivity: ≤ -35dBm

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Fiber interface: dual SC/dual FC/single SC

Applicable fiber: single-mode, multi-mode

Chart 9.2 Optical interface definition

5.3 Manage interface and extend port

features:

Interface: RS-232；

Interface connector: RJ-45；

Manage interface baud rate: 57600bit/s；

Extend max baud rate: 19200bit/s。

TX RX

GND TX RX

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Chart 9.3 RS-232 interface definition

Chart 9.4 Extend port definition

5.4 Ethernet interface features:

Interface: 10/100Base-Tx

Interface specification: compliance with IEEE-802.3u

Connector: RJ45

Bandwidth:2 M

3

TX+TX- RX+ RX-

21 6

RXGNDTXDTRCD CTS

RTS

1 2 3 4 5 6 7 8

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Chart 9.5 Ethernet interface definition

Notice: must compliance with the standard to make Ethernetinterface line, please refer to the appendix

5.5 Electric features of V.35 interface:

interface speed:n×64K

no traffic control, transparent transmission

interface connector:DB25 slot

work mode: DCE, DTE optional

V.35 Interface Definition

(DCE mode: E1 master clock/E1 slave clock/V.35 external clock):

Pin M/34 I/O Definition Function

1 A GND Signal ground

2 P I TDA Transmit data cable A

3 R O RDA Receive data cable A

4 C I RTS Send request

5 D O CTS Send permission

6 E O DSR Data device ready

7 B GND Protected ground

8 F O DCD Data carrier detect

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9 X O RCPB Receive clock cable B

10 I Reserved

11 W I ETCB External clock cable B

12 AA O TCPB Transmit clock cable B

13 NC

14 S I TDB Transmit data cable B

15 Y O TCPA Transmit clock cable A

16 T O RDB Receive data cable B

17 V O RCPA Receive clock cable A

18 NC

19 NC

20 H I DTR Data terminal ready

21 NC

22 NC

23 I Reserved

24 U I ETCA External clock cable A

25 NC

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V.35 interface definition (DTE mode):

Pin F/34 I/O Definition Function

1 A GND Signal ground

2 R I RDA Receive data cable A

3 P O TDA Transmit data cable A

4 D I CTS Send permission

5 C O RTS Send request

6 H O DTR Data terminal ready

7 B GND Protected ground

8 O Reserved

9 W O ETCB External clock cable B

10 AA I TCPB Transmit clock cable B

11 X I RCPB Receive clock cable B

12 O Reserved

13 NC

14 T I RDB Receive data cable B

15 O Reserved

16 S O TDB Transmit data cable B

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17 U O ETCA

18 NC

19 NC

20 E I DSR

21 NC

22 NC

23 Y I TCPA Transmit clock cable A

24 V I RCPA Receive clock cable A

25 NC

5.6 Power Supply

DC voltage: -48VDC, margin: -36V~-72V

Power supply ripple: ≤240mVp-p

DC +24V: +24 V±15％

DC -24V: -24 V±15％

AC voltage: 220VAC±15% 50Hz

Power consumption: ≤10W

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5.7 Working Environment

Environmental temperature: 0℃~45℃

Relative humidity: ≤90%（35℃）

Air pressure: 86~106Kpa

5.8 Dimension

200×145×45 mm

6 Application

Application 1

MST 30A series fiber optic modem can take any signal through E1.

Following is the typical application.

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6.1 MST series Fiber Optic Modem typical application

Application 2


Application 3

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7 Appendix

7.1 Lines for management interface

The management interface is connected to the serial port of PC via

simplified RS232 interface, therefore simply connect the following three

signal lines: RXD, TXD and GND. See the figure below for the

corresponding relations.

7.2 Lines for Ethernet interface

Two standards for the sequence of lines of Ethernet interface EIA／TIA

568A and EIA／TIA T568B are shown as Appendix Fig. 2. When

producing RJ45 connectors, be sure to follow these standards.

Appendix Fig. 1 Production of connecting lines for management interface

456

523

RJ45 DB9PCDevic

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Appendix Fig. 2 Production of connecting lines for Ethernet interface

7.3 Lines for E1 interface

Impedance of equipment interface: 75Ω, interface: BNC coaxial.

75Ω non-balance mode, the transmission impedance of the connecting

lines are required to be 75Ω and use 75Ω coaxial cable. If the user’s

equipment is built with a coaxial interface, see Appendix Fig. 3 for the

production of connecting lines.

BNC coaxial head 75Ω coaxial cable Coaxial head matching

with the user’s equipment, connect it to the peer equipment

Appendix Fig. 3 75Ω Production of

Coaxialheadmatchingwith theuser’s

BNC 75Ω

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7.4 DC power supply

See the figure below for the rear panel of DC power supply equipment.

Appendix Fig. 4 Rear panel of power supply

For DC -48V models, -Vin to -48V, +Vin to power ground wire and GND

to protection ground wire.

GND -Vin +Vin

Appendix Fig. 3 120Ω Production of

RJ45RJ45 120Ω

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For DC +24V, -Vin to power ground wire , +Vin to +24V and GND to

protection ground;

For DC -24V, -Vin to -24V, +Vin to power ground wire and GND to

protection ground;

For DC±24 V, -Vin to -24V, +Vin to +24V and GND to protection

ground.

Ebb Mst30 & Mst155m Series32

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