Nortel Networks 1000 - Manual (Page 830)

830 NTAK79 2.0 Mb PRI card
Figure 255
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 348
Switch SW1
Switch Down (On) Up (Off)
SW 1-1 enable DCHI disable DCHI
SW 1-2 DPNSS1/DASS2 Q.931
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.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
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