Owner's manual

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