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NT5D33 and NT5D34 Lineside E1 Interface cards Page 255 of 894
Circuit Card Description and Installation
Line supervision on E1 failure
This setting determines in what state all 30 LEI ports will appear to the
CS 1000S, CS 1000M, and Meridian 1 in case of E1 failure. Ports can appear
as either in the “on-hook” or “off-hook” states on E1 failure.
Note: All idle LEI lines will go off-hook and seize a Digitone Receiver
when the off-hook line processing is invoked on E1 failure. This may
prevent DID trunks from receiving incoming calls until the LEI lines
time-out and release the DTRs.
Daisy-Chaining to MMI
If two or more LEIs will be installed and the MMI used, daisy-chain the cards
together to use one MMI terminal or modem. Make the selection for this dip
switch position based on how many LEIs are being installed.
MMI Master or Slave
This setting is used only if daisy-chaining the cards to the MMI terminal or
modem. It determines whether this card is a master or a slave in the daisy
chain. Select the master setting if there are no LEIs between this card and the
MMI terminal or modem. Select the slave setting if there are other cards in
the daisy chain between this card and the MMI.
Tables 91 through 93 show the dip switch settings for Switch #1. Table 94 on
page 258 shows the dip switch settings for Switch #2.
Table 91
LEI card – Switch #1 dip switch settings (Part 1 of 2)
Characteristic Selection
Switch
Position
Switch
Setting
Factory
Default
MMI port speed selection 1200 baud
2400 baud
1
1
ON
OFF
OFF
E1 signaling Ground start
Loop start
2
2
ON
OFF
OFF