3-56Hardware feature descriptions

Equipping rules

The VTX-48e circuit pack is a double-width circuit pack that is installed in slot 13 and slot 14 of the OPTera Metro 3500 shelf. The OPTera Metro 3500 shelf must be equipped with VTX48e circuit packs if OC-12 circuit packs are in the line slots.

Note 1: The VTX-48 circuit pack (NTN414AA) only supports the OC-48 line rate in slots 11 and 12.

Note 2: The OC-12 line rate is supported in slots 11 and 12 only if slots 13 and 14 are equipped with VTX-48e circuit packs (NTN414AB or NTN414AH).

See Table 3-3 on page 3-6for operational temperature ranges.

Alarm LED definitions

The following table provides a list of LEDs on the VTX-48e circuit packs.

LED name

Color

Description

 

 

 

Status (top)

red

Circuit pack failure

 

 

 

Status (bottom)

green

VTX in an in-service state

 

 

 

Pri Fail

yellow

Loss of primary timing reference signal

 

 

 

Sec Fail

yellow

Loss of secondary timing reference signal

 

 

 

Extended shelf processor (SPx) (NTN423BA, BH)

The extended shelf processor (SPx) provides shelf level control, handles all shelf communications, and runs the system software. The SPx uses a diskless storage media for permanent storage of the software load and to record the network element provisioning and history. RS-232 connections can be made either to the SPx faceplate connector or to a LOAM connector. System software resides in the SPx or the network processor nonvolatile memory.

The SPx raises equipment alarms for the co-located extended network processor (NPx), backs up NPx provisioning data and provides shelf information and NPx provisioning data to the NPx during an NPx restart.

TL1 sessions

TL1 sessions are hosted by the SPx and all TL1 commands are interpreted by the processor. Once the commands have been interpreted, the SPx instructs the dedicated processors in other circuit packs as to what action is to be taken.

OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004

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Nortel Networks NTRN10AN, 3500 manual Extended shelf processor SPx NTN423BA, BH, TL1 sessions