Physical Interface Configuration

RN33011EN20GLA0_Physical Interface Configuration and Supervision 1 © Nokia Siemens Networks

Physical Interface Configuration and Supervision for RNCRN3301-20A RU20 RAN Integration


Objectives

At the End of This Module the Participant Will Be Able To:

• Configure Physical Interfaces.

• Create SDH Protection.

• Create IMA Group.

• Create a Physical Layer Trail Termination Point.


Physical Interface Configuration and SupervisionContents

PDH Interface and IMA

SDH Interface and Protection Group

Physical Interfaces in RNC

Physical Layer Trail Termination Point


Physical Interface Configuration and Supervision

PDH Interface and IMA Group






Interface type Functional unit Interfaces per unit Medium Connector

STM-1NIS1 / NIS1P 4

Optical fibre SCNPS1 / NPS1P 8

PDH E1/T1/JT1 NIP1 16

Coax 75 ohm BT43

Bal 120 ohm RJ45S

Ethernet NPGE / NPGEP 2Electrical RJ45

Optical fibre LC


PDH Interface E1/T1/JT1

• Called PET (PDH Exchange Terminal)

• Interrogate configurationZYAI:PET

• Example output:

EXCHANGE IF IMPEDANCE LOOPBACK PAYLOAD SA BIT IMATERMINAL MODE (OHM) DIA LINE SCRAMBLING FOR SSM GROUP PHY TTP-------- ---- --------- --------- ---------- ------- ----- -------PET 0 E1 75 OFF OFF ENABLED 5 10 10PET 1 E1 75 OFF OFF ENABLED 5 10 10PET 2 E1 75 OFF OFF ENABLED 5 10 10PET 3 E1 75 OFF OFF ENABLED 5 10 10PET 4 E1 75 OFF OFF ENABLED 5 - 11PET 5 E1 75 OFF OFF ENABLED 5 - 12

...


PDH Interface Configuration

ConfigurationMML Command

Interrogate Modify

Interface operation mode(E1/T1/JT1, impedance) ZYAI:PET ZYAE

E1 functional mode(double frame/CRC4) ZYEI ZYEC

T1 functional mode(super frame type, line coding, output signal

level)ZYEH ZYEG

PET configuration(payload scrambling, loopback, SSM) ZYAI:PET ZYAM:PET

PET timeslot usage ZYAV ZYAW


PET Loopback

PET

Tx Rx

Diagnostic loopback

Line loopback

• Loopback types:

• Diagnostic loopback – Loop to equipment

• Line loopback – Loop to interface

• Use for testing purpose only, traffic down during test

• Configure with ZYAM


Inverse Multiplexing for ATM (IMA)

IMA GroupPHY Layer

PHY Layer

PHY Layer

IMA Group Physical Link #1

Physical Link #2

Physical Link #3

PHY Layer

PHY Layer

IMA Virtual Link

Single ATM Cell Stream from ATM Layer

Original ATM Cells Stream passed to ATM Layer

PHY Layer

• Combining multiple PET for higher capacity or protection in case of failure.

• Max 8 PET in one IMA group.

• All PET must belong to the same NIP1.

• Configure by command group ZYB.


SDH Interface

• Called SET (SDH Exchange Terminal)

• Interrogate configurationZYAI:SET

• Example output:EXCHANGE MULTIPLEX THRESHOLDS LOOPBACK LASER VCTERMINAL SES BIP SD BER SF BER DIA LINE STATE SDH MODE MAPPING-------- ------- ------- ------- --------- ----- ----------- -------SET 0 2400 10^(-5) 10^(-5) OFF OFF ON SDH STM-1 VC4

PROT GROUP---------- -

HIGHER ORDER PATHS CONFIGURATION:

VC PATHNUMBER PHY TTP--------- ------- 1 1

LOWER ORDER PATHS CONFIGURATION:NO LOWER ORDER PATHS


SDH Interface Configuration

• Modify SET configuration (BER thresholds, loopbacks, laser, SDH/SONET)

ZYAN

• SDH trace

• For STM-1 connection check, must configure the same on both side of link.

• Format: 0..255 or 15 characters or 62 characters

• MML Commands Interrogate: ZYAT

Modify: ZYAS


SDH Protection Group

• SDH/SONET with protect against:

• Link failure

• Interface failure

• Interface unit failure in case of NIS1P, NPS1P

• Protocol compliant:

• MSP 1+1 (Multiplex Section Protection) for SDH

• APS 1+1 (Automatic Protection Switching) for SONET

RNC Other SiteWorking Section

Protection Section


SET-8

SDH Protection Group Configuration

• Command group ZYW.

• For NIS1, NPS1: Both SET must belong to the same NIS1/NPS1.

• For NIS1P, NPS1P: Each SET must belong to different NIS1P/NPS1P of the pair units.

• Backplane cabling between units for NIS1P, NPS1P required.

Working

Protection

NPS1-0

SET-0

SET-1

Working

ProtectionNPS1P-0

SET-0

NPS1P-1

Same unit Different unit of the pair


SDH Transmission Protection

• Protection switching mode:

• Revertive – Back to working section when working is restored.

• Non-revertive – Switch remain at protection even working is restored.

• Bidirectional switching – Switches at both sides at the same position. (Unidirectional not supported)

Working Section

Protection Section


Physical Layer Trail Termination Point (phyTTP)

• Must be created before a physical interface can be used for ATM.

• Can be detached and then attached to a different physical interface.

• Command group ZYD.

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Review Questions

1. What is the command group for:

• SDH protection group?

• IMA group?

• Physical trial termination point?

2. Give three examples of parameters of PDH and SDH interfaces configurable by MML?

Physical Interface Configuration

Documents

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