Nortel Networks OPTera Metro 3500 - Manual (Page 254)

3-26 Hardware feature descriptions
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Replaceable I/O modules
I/O modules for the OPTera Metro 3500 Shelf and the OPTera Metro 3500
Universal Shelf provide input and output of electrical signals for traffic. To
provide additional width for the optical interfaces and STX and VTX-series
circuit packs, the tributary I/O connections are located on the top of the shelf.
The I/O modules are removable and replaceable.
The traffic I/O slots on both the OPTera Metro 3500 Shelf and OPTera Metro
3500 Universal Shelf are numbered 3 through 10. The I/O slots correspond
with the transport slots. There are rules for which type of traffic I/O module
can be present in which slot, based on the equipment in the corresponding
transport slot.
Note 1: On the OPTera Metro 3500 Universal Shelf, you can mix Rear I/O
modules with Front Enhanced modules.
Note 2: You are recommended to use ’straight’ cables for front-facing
DS1 I/O modules.
Note 3: You are recommended to use ’right-angle’ cables for rear-facing
DS1 I/O modules.
See Table 3-3 on page 3-6 for operational temperature ranges and hardware /
shelf type compatibility.
The OPTera Metro 3500 Shelf Assembly (NTN476AA or NTN476DA) I/O
modules are as follows:
• DS1 1-28 Front I/O module (NTN452AA), see Figure 3-6
• DS1 29-56 Front I/O module (NTN452CA), see Figure 3-7
• DS1 29-84 Front I/O module (NTN452EA), see Figure 3-8
• BNC 12-Port Front I/O module (NTN452JA), see Figure 3-9
• 8xRJ-45 Front I/O module (NTN452NA), see Figure 3-10
Note: One 8xRJ-45 I/O is required for each 2x100BT-P2P circuit pack or
4x100BT circuit pack.