Nortel Networks Circuit Card 311 Benutzerhandbuch
Installation and configuration
215
The MMI (described in detail in
monitors the T1 link for specified performance criteria and reports on
problems detected.
problems detected.
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
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
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
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.
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).
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
MMI port connections can be daisy-chained together so that only one
MMI terminal is required for up to 128 Lineside T1 cards. See
.
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.
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:
MMI terminal:
Step
Action
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.
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
plugging the DB9 female connector labeled "P4" (away from MMI
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.