Nortel Networks 1000 - Manual (Page 183)

Installation and configuration 183
DSX-1 length
Estimate the distance between the Lineside T1 card and the hardwired
local CPE, or the Telco demarc RJ48, for the carrier facility connecting the
Lineside T1 and the remote CPE. Make the selection for this dip switch
position based on this distance.
Line supervision on T1 failure
This setting determines in what state all 24 ports of the Lineside T1 card
appears to the CS 1000M, CS 1000E and Meridian 1in case of T1 failure.
Ports can appear as either in the on-hook or off-hook states on T1 failure.
Note: All idle Lineside T1 lines go off-hook and seize a Digitone
Receiver when the off-hook line processing is invoked on T1 failure.
This may prevent DID trunks from receiving incoming calls until the
Lineside T1 lines time-out and release the DTRs.
Daisy-chaining to MMI
If two or more Lineside T1 cards are installed and the MMI is used,
daisy-chain the cards together to use one MMI terminal or modem, See
Figure 35 "Lineside T1 card - connecting two or more cards to the MMI"
(page 202)
. Make the selection for this dip switch position based on how
many Lineside T1 cards are installed.
MMI master or slave
This setting is used only if daisy-chaining the cards to the MMI terminal or
modem. This setting determines whether this card is a master or a slave in
the MMI daisy-chain. Select the master setting if this card is the card that
is cabled directly into the MMI terminal or modem; select the slave setting
if this card is cabled to another Lineside T1 card in a daisy chain.
Table 73 "Lineside T1 card-T1 Switch 1 (S1) dip switch settings" (page
183)
through Table 76 "Lineside T1 card - CPE or CSU distance dip
switch settings (Switch S2, positions 3 - 5)" (page 185) describes the
proper dip switch settings for each type of T1 link. After the card has been
installed, the MMI displays the DIP switch settings the command
Display
Configuration is used. See “QPC43 Peripheral Signaling card” (page
101) for details on how to invoke this command.
Table 73
Lineside T1 card-T1 Switch 1 (S1) dip switch settings
Dip Switch
Number Characteristic Selection
1 MMI port speed selection On = 1200 baud
Off = 2400 baud
2 T1 signaling On = Ground start
Off = Loop start
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.