7/29/2019 Meridian BARS Programming

1/4

Meridian BARS Programming:

Third-Party Cellular Gateways (GSM

Gateways)

Introduction

GSM Gateways" provide direct trunk access to the local cellular network. These

gateways are external devices that provide direct access between the PBX and the

local cellular provider's network, bypassing the local switched network. This makes

the call appear to the network to have originated from another mobile of the same

network, so it enjoys a cheaper call rate.

The PBX must be programmed to route calls to cellular numbers via the gateway

device. Trunk access codes (ACODs) can be used to do this, but users must remember

to use the appropriate ACOD, depending on the call type. The preferred solution is to

automatically route the call by analyzing the digits dialed. This is accomplished by

implementing Basic Alternate Route Selection (BARS) feature through theprogramming of a Special Number (SPN) translation data blocks for each code prefix.

Routing Calls to Cellular Gateways

The following process will help guide you through programming the routing of calls

made to cell phone numbers on a Meridian switch where BARS is already in effect, as

indicated by LD 86 ESN, AC1 = 9 (or any other number).

Process steps -

1. Identify all numbers targeted for routing to the gateway device and comparethese to existing SPNs.

These numbers must include all digit(s) used locally to access cell phone numbers,

such as a leading "0" followed by a cellular prefix. These numbers would not include

the "9" used to access BARS as that is stripped off by the PBX automatically.

Print LD 90 (NET/AC1/SPN).Look for any SPNs that may already be associated with these targeted numbers.

If there are already SPNs covering the range of these cellular numbers, determine

whether there are any landline numbers that are also covered by those SPNs.

Make a list of the SPNs required for the cell phone number sequences and for any

landline numbers.

e.g. In this example from a LD 90 printout, if your cellular dialing sequence starts

with "051", you would determine whether there are any landline prefixes also starting

with "05".

7/29/2019 Meridian BARS Programming

2/4

SPN 05

FLEN 0

INPL YES

RLI 3

SDRR NONE

ITEI NONE

2. Determine if Digit Manipulation is required.

If Digit Manipulation is required, create a Digit Manipulation Index (DMI) table inthe DGT block using LD 86.

Print DGT, LD 86 to find an unassigned DMI number.

Prompts and responses for DMI creation follow -

>LD 86

REQ NEW

CUST 0

FEAT DGT

DMI 1-255 (cannot be 0)

DEL x..x (number of digits to delete, NOT the actual digits.

if not needed)

INST x..x (actual digits to be inserted.)( till end of LD 86)

3. Determine Route List Index (RLI) requirements for the list of routes where

you want to send the calls to cellular numbers.

Print RLB, LD 86.

Note the current RLI settings for landline calls (as determined from LD 90 SPN list

printed above), particularly Route assigned, FRL, DMI, and next available RLI

number.

Identify Route number assigned to gateway device (LD 21, RDB).

4. Create a new Route List Index (RLI) for calling cell phone numbers.

This RLI should have at least two entries -Entry 0 should point to the Route created for the cellular gateway device, and Entry 1

should point to the PTT city trunk or landline used for external calls from Post.

>LD 86

REQ NEW

CUST 0

FEAT RLB

RLI x (use next available RLI identified in Step 2)

ENTR 0 (routing to Gateway)

LTER

ROUT x (insert route number leading to gateway device)

TOD 0

EXP

FRL x (0 for no restrictions, or use the FRL assigned to your

current

landline RLI)

( up until DMI field is displayed)

DMI x (enter DMI if required as built in Step 2 above)

( to next ENTR)

ENTR 1 (routing to landline)

LTER

ROUT x (insert route number leading to landline)

TOD 0

7/29/2019 Meridian BARS Programming

3/4

EXP

FRL x (0 for no restrictions, or use the FRL assigned to your

current

landline RLI)

( up until DMI field is displayed)

DMI x (enter DMI if required as built in Step 2 above)

( till end of LD 86)

5. Remove (OUT) any SPNs that cover both landline and cellular.These SPNs must be removed (OUT'ed) before new, more specific SPNs are created

to cover the different numbers. Be advised, that in the interim between removal and

build, calls via BARS to these numbers will not be passed through the PBX. So it is

recommended that you not remove the existing SPNs until you are ready to start

sending calls through the gateway devices.

For the example above, SPN 05 would need to be OUT'ed, and 10 new SPNs need to

be created (050, 051, 052, 053, 054, 055, 056, 057, 058, 059).

>LD 90

REQ OUT

CUST 0

FEAT NET

TRAN AC1

TYPE SPN

SPN 05

6. Create new SPNs to cover cellular and landline numbers.

For the above example, SPN 051 as the leading digits of a cellphone number would be

associated with the new RLI built in Step 4 above. The other 9 SPNs noted above

would be populated with RLI 3, which was associated with the previous landline SPN

05.

Examples follow -

>LD 90

REQ NEW

CUST 0

FEAT NET

TRAN AC1

TYPE SPN

SPN 050

( to RLI)

RLI 3

( to next SPN prompt)

SPN 051

( to RLI)RLI x (enter RLI built in Step 4)

( to next SPN prompt)

SPN 052

( to RLI)

RLI 3

( to next SPN prompt. Continue until all SPNs are built)

7/29/2019 Meridian BARS Programming

4/4

Conclusion -

The system will now route all calls to cell phones through the gateway device. If the

trunks are busy, the call will fallback to the landline and should still reach the cell

phone.

Be aware that if the gateway devices fail or lose power, the PBX will not be aware of

this and may continue to attempt to route calls unsuccessfully. Check out SBOC (Step

Back on Congestion), RRA (Reroute all), to pass calls to the next RLI entry in thiscase.