01a physical interface configuration ds

1 Physical Interface Configuration and Supervision

Physical Interface Configuration and Supervision for RNC

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.

Reference: Physical Interfaces Configuration and Supervision (dn03549536)



Physical Interfaces in ATM network



•Physical layer processing covers transfer and management functions of both PDH and SDH based transmission interfaces.

•Physical interfaces in RNCUnit IF/Plug in Unit Medium

Connector

SDH / STM-1 (155 Mbit/s)NIS1 4 optical fibre SC

PDH / E1 (2 Mbit/s) NIP1 16 Coax 75 ohm BT43 (coax)Bal 120 ohm RJ45S (bal)

•Configure with MML command group ZYA/ZYE

Physical Layer Functionality



SDH Layers

SDHMultiplexer

SDHTerminalMultiplexer

SDHTerminalMultiplexer

Regenerator

SDHMultiplexer

MultiplexSection

MultiplexSection

MultiplexSection

RegeneratorSection

RegeneratorSection

Path



Physical Layer Loopbacks


Physical Interface Configuration and Supervision for RNCPhysical Layer Trail Termination

Point



RNC Interfaces RNC

SET ...

PET ....

PET

PET

Physical IF Logical IF

IMA Group ID=.......

SET ...

profile

ATM IF ID=......

profile

ATM IF ID=......

profile

ATM IF ID=......

profile

ATM IF ID=......

profile

ATM IF ID=......

profile

ATM IF ID=......

phyTTP

PET ....

VPI=....VCI=....

1

12

3

VC-4

Mappin

g

VC-3

Mappin

g



SDH MSP 1+1 Protection• Compliant with standard SDH MSP (Multiplex

Section Protection).

• Against equipment failures (at the interface).

• Against point-to-point link failures.

Protecting link

Link in operation

SiteRNC

RNC Configuration:

Operating STM-1 interface

Protecting Interface



SDH Transmission Protection



IMA Groups

Inverse multiplexing for ATM (IMA):

• For all PDH based ATM interfaces

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

ATM Layer

Physical Medium Sublayer

Transmission Convergence Sublayer (TC)Physical Layer TC

IMA

01a physical interface configuration ds

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