Table 87 "lineside – Nortel Networks Circuit Card 311 User Manual

Page 192

192

NT5D11 and NT5D14 Lineside T1 Interface cards

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 1 in 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 36 "Lineside T1 card - connecting two or more cards to the MMI"
(page 211)

. 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 87 "Lineside T1 card-T1 Switch 1 (S1) dip switch settings" (page
192)

through

Ta ble 90 "Lineside T1 card - CPE or CSU distance dip

switch settings (Switch S2, positions 3 - 5)" (page 194)

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

104)

for details on how to invoke this command.