- Nortel Network Multiservice Platform User's Guide

Hardware feature descriptions 3-27
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
The OPTera Metro 3500 Universal Shelf Assembly (NTN476AH) I/O
modules are as follows:
• DS1 1-28 Front Enhanced I/O module (NTN452AH), see Figure 3-11
• DS1 29-56 Front Enhanced I/O module (NTN452CH), see Figure 3-12
• DS1 29-84 Front Enhanced I/O module (NTN452EH), see Figure 3-13
• BNC 12-Port Front Enhanced I/O module (NTN452JH), see Figure 3-14
• 8xRJ-45 Front Enhanced I/O module (NTN452NH), see Figure 3-15
• DS1 1-28 Rear I/O module (NTN452BA), see Figure 3-16
• DS1 29-56 Rear I/O module (NTN452DA), see Figure 3-17
• DS1 29-84 Rear I/O module (NTN452FA), see Figure 3-18
• BNC 12-Port Rear I/O module (NTN452KA), see Figure 3-20
• 8xRJ-45 Rear I/O module (NTN452HB), see Figure 3-19
Note: One 8xRJ-45 I/O is required for each 2x100BT-P2P circuit pack or
4x100BT circuit pack.
For details of I/O slot positions and the traffic type supported by each module,
see Table 3-5. For examples of the OPTera Metro 3500 shelf equipped with I/O
modules, see Figure 3-2 and Figure 3-3.
Note: You must install a Rear I/O Cable Retainer (NTN450ZA for the
23-inch bracket, NTN450ZB for the 19-inch bracket) for each of your
OPTera Metro 3500 shelves equipped with a Rear I/O module. The cable
retainer relieves cable pressure on the connectors of the rear I/Os. See
Installation, 323-1059-201 for installation information. See PEC tables on
page 8-10 (in Part 2 of this guide) for ordering information.