Mmi connections – Nortel Networks 1000 User Manual

Page 206

206

NT5D11 and NT5D14 Lineside T1 Interface cards

One of the ways it can report information is through this external alarm
connection. If connected, the Lineside T1 card’s microprocessor activates
the external alarm hardware if it detects certain T1 link problems that it
has classified as alarm levels 1 or 2. See

“Functional description” (page

385)

for a detailed description of alarm levels and configuration. If an

alarm level 1 or 2 is detected by MMI, the Lineside T1 card closes the
contact that is normally open, and opens the contact that is normally
closed. The MMI command

Clear Alarm

returns the alarm contacts to

their normal state.

MMI connections

P5 connector pins 2, 3, 5, 7 and 9 are used to connect the Lineside T1
card to the MMI terminal and daisy chain Lineside T1 cards together for
access to a shared MMI terminal. When logging into a Lineside T1 card,
"control 2" is asserted by that card, which informs all of the other cards
not to talk on the bus, but rather to pass the data straight through. The
pins labeled "control 1" are reserved for future use. As with the external
alarm connections, MMI connections are optional. Up to 128 Lineside T1
cards, located in up to 16 separate IPE shelves, can be linked to one MMI
terminal using the daisy chaining approach.

If only one Lineside T1 card is being installed, 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 two or more Lineside T1 cards are being installed into the system, the
MMI port connections can be daisy-chained together so that only one
MMI terminal is required for up to 128 Lineside T1 cards. See

Figure 37

"Lineside T1 card - connecting two or more cards to the MMI" (page 209)

Cards can be located in up to 16 separate IPE shelves. Any card slot
in the IPE shelf can be connected to any other card slot; the card slots
connected together do not need to be consecutive.

Follow this procedure for connecting two or more Lineside T1 cards to the
MMI terminal:

Step

Action

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.

Make the connection from the first card to the second card by
plugging the DB9 female connector labeled "P4" (away from MMI

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

02.06

Standard

27 August 2008