Nortel Circuit Card 311 Reference page 930

930 NTAK79 2.0 Mb PRI card
Figure 279
NTAK79 card with switch locations
Switch SW1 - DCHI Configuration
This switch enables/disables the on-board DCHI and sets the operating
mode of the DCHI. DPNSS1 mode is not supported at this time. For all
other countries that do not use DPNSS, use Q.931 mode.
Table 383
Switch SW1
Switch
SW 1-1
SW 1-2
Switch SW2 - Carrier Impedance Configuration
This switch sets the carrier impedance to either 120 ohms or 75 ohms.
Twisted pair cable is usually associated with 120 ohms. Coaxial cable is
usually associated with the 75 ohms setting.
Copyright © 2003-2008, Nortel Networks
.
Down (On)
enable DCHI
DPNSS1/DASS2
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Up (Off)
disable DCHI
Q.931