Nortel NT1R20 Description page 184

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553-3001-105 Standard 5.00 June 1999
NT5D33 and NTRB34 Line-side E1 Interface Cards
If you are installing only one LEI, cable from the DB9 male connector labeled
"P5" (toward 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 female
connector labeled "P4" (away from MMI terminal).
If you are installing two or more LEIs 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 LEIs (as shown in Figure 36). Cards can be located
in up to 15 separate IPE shelves. You can start with any card slot in your IPE
shelf and connect to any other card slot; connected card slots do not need to
be consecutive.
Follow this procedure for connecting two or more LEIs to the MMI terminal:
1 Cable the DB9 male connector labeled "P5" (toward 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" (toward 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
from the DB9 female connector labeled "P4" (away from MMI
terminal).
5 If two LEIs are too far apart to connect the "P4" and "P5" connectors
connect them with an off-the-shelf DB9 female to DB9 male
straight-through extension cable, available at any PC supply store.