Owner's manual

Operation 503

Figure 131

Loop start call states - incoming call from CO/FX/WATS

The alerting signal into the Meridian 1 is 20 Hz (nominal) ringing sent by

the CO. When an incoming call is answered, ringing is tripped when the

Meridian 1 places a low-resistance dc loop across the tip and ring leads

toward the CO. See Figure 137 "Loop start call states - incoming call from

CO/FX/WATS" (page 510) and Figure 138 "Loop start call connection

sequence - incoming call from CO/FX/WATS" (page 511).

The alerting signal into the CS 1000 is 20 Hz (nominal) ringing sent by the

CO. When an incoming call is answered, ringing is tripped when the CS

1000 places a low-resistance dc loop across the tip and ring leads toward

the CO. See Figure 133 "Loop start call states - incoming call" (page

505) and Figure 134 "Loop start call connection sequence - incoming call"

(page 506).

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008