Nortel DMS 100 Series Maintenance Manual page 103

Figure 4-7 DC5A to DC5A call setup
t
i
m
e
*
Start T1,T2
*
Stop T2
Start T3
*
Stop T3
**
Start T7
*
Stop T7
Start T9
*
Stop T9,T1
Call origination sequencing from a DC5A line to a DC5A line.
1. AMC to originating exchange After the originating exchange receives a
2. Originating exchange to terminating exchange After the originating
DMS-100 Family Remote Switching Center Multi-Access Maintenance Manual XPM11 and up
originating
DC5A
seizure
DTMF digits
last DTMF digit
call established
seizure signal from the AMC, the T1 and T2 timers start. When the
exchange receives the first DTMF digit, the T2 timer stops and T3 starts.
The T3 timer restarts after the originating exchange receives each DTMF
digit.
exchange receives all DTMF digits the exchange selects an outgoing
route. The originating exchange sends an IFAM message to the
RSC-M Signaling and Communications 4-13
terminating
office
BTUP
*
*
IFAM
*
**
ACM
*
ring-
ing
ANM
*
speech
office
DC5A
seizure
DTMF digits
last DTMF digit
call established