Nortel Communication Server 1000 Fundamentals page 57

which have the special function of providing connectivity to the MMI and
SDI, respectively, for the daisy chain. Card 1 is the card at the MMI end,
providing connectivity to the MMI, and must keep SW2, Position 7, OFF.
Card 3 is at the SDI end, providing connectivity to the SDI, and must keep
SW2, Position 8, OFF.
LMI 2, in cases such as the above, is an intermediate card, connected to
neither the SDI end nor the MMI end. In daisy chains of more than two
cards, all intermediate cards must have both Positions 7 and 8 of SW2 ON
for the system to function properly.
Table 10 "LMI SW3 at U51 functions" (page 57)
SW3 at each position:
Table 10
LMI SW3 at U51 functions
Position Usage
1-3 T1 line build-out
4 framing mode: ESF = OFF, D4 = ON
5
baud 9600 = OFF, 2400 = ON
6
terminal settings: N,8,1 = OFF, M, 7, 1 = ON
7-8
not used
Table 11 "T1 Line Build-Out table" (page 57)
positions 1-3 to set various T1 Line Build-out lengths:
Table 11
T1 Line Build-Out table
LENGTH
534 – 655 feet
400 – 533 feet
267 – 399 feet
134 – 266 feet
0 – 133 feet
The default switch settings are all OFF except SW3 position 1, which is
ON. These settings correspond to a T1 Line Build-Out of shortest length
and ESF framing mode. The MMI and SDI connections run at 9600 baud
and default to no parity, 8 data bits, and 1 stop bit (N, 8, 1).
Note:
Both T1s are set to the same cable distance and framing mode.
Nortel Communication Server 1000
Mini-Carrier Remote Fundamentals
NN43001-557 04.01 4 June 2010
Copyright © 2003-2010 Nortel Networks. All Rights Reserved.
shows the function of LMI
shows the settings for SW3,
SW3 DIP switch positions (1 = ON, 0 = OFF)
1 2
0 0
0 0
0 1
0 1
1 0
System installation 57
3
0
1
0
1
0