Nortel Networks 1000 - Manual (Page 509)

Operation 509
is ready to receive digits, it returns dial tone. Outward address signaling
is then applied from the Meridian 1 in the form of loop (interrupting) dial
pulses or DTMF tones.
For outgoing calls, the software sends an outgoing seizure message to
place a low-resistance loop across the tip and ring leads toward the CO.
See
Figure 143 "Ground start call states - incoming call" (page 517) and
Figure 144 "Ground start call connection sequence - incoming call"
(page 518)
. When the CO detects the low-resistance loop, it prepares to
receive digits.When the CO is ready to receive digits, it returns a dial tone.
Outward address signaling is then applied from the CS 1000 in the form of
loop (interrupting) dial pulses or DTMF tones.
For outgoing calls from a telephone set or attendant console, software
sends an outgoing seizure message to place a low resistance loop across
the tip and ring leads towards the CO. When the CO is ready to receive
digits, it returns dial tone. The outward address signaling is applied from
the system in the form of DTMF tones or dial pulses.
Polarity-sensitive/-insensitive packs feature The CS 1000 software
provides the polarity-sensitive/polarity-insensitive (PSP and PIP) packs
feature for the accurate recording of outgoing call duration for loop start
and ground start operation.
On trunks equipped with far-end answer supervision, the PSP class of
service is enabled in software and causes call-duration recording in CDR
records to begin only upon receipt of answer supervision from the far-end.
For trunks not equipped with answer supervision, the PIP class of service
is enabled and call-duration recording begins immediately upon near-end
trunk seizure. The PSP and PIP classes of service are enabled in the
Trunk Administration program LD 14.
The Meridian 1 software provides the Polarity-Sensitive/Insensitive Packs
(PSP and PIP) feature for the accurate recording of outgoing call duration
for loop start and ground start operation.
On trunks equipped with far-end answer supervision, the PSP class of
service is enabled in software and causes call-duration recording in CDR
records to begin only upon receipt of answer supervision from the far-end.
For trunks not equipped with answer supervision, the PIP class of service
is enabled and call-duration recording begins immediately upon near-end
trunk seizure.
The PSP and PIP classes of service are enabled in the Trunk
Administration program (LD 14).
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.