Nortel Networks NTRN10AN, 3500 manual Shelves equipped with VTX-48 or VTX-48e circuit packs

3-4Hardware feature descriptions

OPTera Metro 3500 Shelf and the OPTera Metro 3500 Universal Shelf (NTN476AA, DA, AH)

Release 12 supports the OPTera Metro 3500 Shelves (NTN476DA, NTN476AA) and the OPTera Metro 3500 Universal Shelf (NTN476AH). Both the OPTera Metro 3500 Shelf and the OPTera Metro 3500 Universal Shelf have 17 slots. Tributary I/O connections are located at the top of the shelf for field-installable I/O modules.

The OPTera Metro 3500 Universal Shelf is rated at 20 A from 0°C to +50°C and is rated at 12.5 A from -40°C to +65°C. See Table 4-1 on page 4-1(in Part 2 of this guide) for power requirements.

The Universal shelf supports both front rear-facing I/Os. Both the OPTera Metro 3500 Shelf and the OPTera Metro 3500 Universal Shelf are rated to operate in a controlled environment central office within the temperature range of 0°C to 50°C (32°F to 122°F). However, the OPTera Metro 3500 Universal Shelf is rated to operate under extended temperature conditions as well, in the range of -40°C to +65°C (-40°F to +149°F).

Note: The OPTera Metro 3500 Universal Shelf (NTN476AH) can operate in the extended temperature range only if all its accessory components are also rated for the extended temperature range. See Table 3-3 on page 3-6.

The Universal shelf has various enhancements to facilitate easy installation of I/O modules and temperature control. All the circuit packs are interchangeable between shelves, however, some restrictions apply, see Table 3-3 on page 3-6for details.

On all types of shelves, slot 1 contains three separate subslots: 1a, 1b, and 1c. Slot 1a is for the left interface (LIF) and slots 1b and 1c are for the power modules. The left OAM (LOAM) attaches to the LIF from the left side of the shelf. The system retrieves inventory information for the LIF, the LOAM, and the power modules through slot 1. You must insert the LIF to retrieve inventory information for these circuit packs.

Shelves equipped with VTX-48 or VTX-48e circuit packs

On all types of shelves, slots 11 through 14 are double-width slots for the OC-48 circuit packs and the VTX-48 or VTX-48e circuit packs. Slots 11 and 12 are high-speed interface slots for the OC-48 or OC-12 optical interface circuit packs. The VTX-48e circuit pack supports the OC-12 line rate for the optics in slots 11 and 12 on any shelf. Slots 13 and 14 are for the VTX-48 modules, which provide the VT and STS cross-connect functions for all service slots. The VTX-48 and VTX-48e circuit packs interface as STS-48 with the optical interface slots 11 and 12 and interface as STS-3 and STS-12 with the slots 3 through 10.

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