Nortel NT1R20 Description page 128

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553-3001-105 Standard 5.00 June 1999
NT5D11 Line-side T1 Interface Card
If you are installing only one line-side T1 card, cable from the DB9 female
connector labeled "P5" (towards MMI terminal) to one of the COM ports on
the back of any TTY, a PC running a terminal emulation program, or a
modem. For installations of only one card, no connection is made to the DB9
male connector labeled "P4" (away from MMI terminal).
If you are installing two or more line-side T1 cards into your Meridian 1
system, you can daisy-chain the MMI port connections together so that only
one MMI terminal is required for up to 128 line-side T1 cards (as shown in
Figure 25). Cards can be located in up to 16 separate IPE shelves. You can
start with any card slot in your IPE shelf and connect to any other card slot;
the card slots connected together do not need to be consecutive. Follow this
procedure for connecting two or more line-side T1 cards to the MMI terminal:
1 Cable the DB9 male connector labeled "P5" (towards MMI terminal) to
one of the COM ports on the back of any TTY, a PC running a terminal
emulation program, or a modem.
2 Make the connection from the first card to the second card by plugging
the DB9 female connector labeled "P4" (away from MMI terminal) from
the first card into the DB9 male connector of the second card labeled
"P5" (towards MMI terminal).
3 Repeat Step 2 for the remaining cards.
4 When you get to the last card in your daisy chain, make no connection to
the DB9 male connector labeled "P4" (away from MMI terminal).
5 If two line-side T1 cards are located too far apart to connect the "P4" and
"P5" connectors together, connect them together with an off-the-shelf
DB-9 female to DB-9 male straight through extension cable, available at
any PC supply store.