
47
Dialogic
®
DSI Signaling Server SGW Mode User Manual Issue 5
5.3.2 MTP3-Specific Timers
MTP3 ITU timers are given in Table 6.
MTP3 ANSI timers are given in Table 7.
Table 6. MTP3 ITU Timers
TO
Range
(milliseconds)
Default
(milliseconds)
Description
1 500 to 1200 1000 Delay to avoid message mis-sequencing on changeover
2 700 to 2000 1500 Waiting for changeover acknowledgement
3 500 to 1200 1000
Time controlled diversion-delay to avoid mis-sequencing on
changeback
4 500 to 1200 1000 Waiting for changeback acknowledgement (first attempt)
5 500 to 1200 1000 Waiting for changeback acknowledgement (second attempt)
6 500 to 1200 1000 Delay to avoid message mis-sequencing on controlled rerouting
10 30 to 60 sec. 45 sec. Waiting to repeat signaling route set test message
12 800 to 1500 1200 Waiting for uninhibit acknowledgement
13 800 to 1500 1200 Waiting for force uninhibit
14 2000 to 3000 3000 Waiting to start signaling route set congestion test
17 800 to 1500 1000
Delay to avoid oscillation of initial alignment failure and link
restart
22 180 to 360 sec. 270 sec. Local inhibit test timer
23 180 to 360 sec. 270 sec. Remote inhibit test timer
24 N/A N/A Reserved
Table 7. MTP3 ANSI Timers
TO
Range
(milli-
seconds)
Default
(milliseconds)
Description
1 500 to 1200 1000 Delay to avoid message mis-sequencing on changeover
2 700 to 2000 1500 Waiting for changeover acknowledgement
3 500 to 1200 1000
Time controlled diversion-delay to avoid mis-sequencing on
changeback
4 500 to 1200 1000 Waiting for changeback acknowledgement (first attempt)
5 500 to 1200 1000 Waiting for changeback acknowledgement (second attempt)
6 500 to 1200 1000 Delay to avoid message mis-sequencing on controlled rerouting
10 30 to 60secs 45 sec. Waiting to repeat signaling route set test message
12 800 to 1500 1200 Waiting for uninhibit acknowledgement
13 800 to 1500 1200 Waiting for force uninhibit
14 2000 to 3000 3000 Waiting to start signaling route set congestion test
17 800 to 1500 1000
Delay to avoid oscillation of initial alignment failure and link
restart
21 N/A N/A Reserved
22 180 to 360 sec. 270 sec.
Local inhibit test timer
NOTE: This timer is referred to as timer T20 in the ANSI
specification.
23 180 to 360 sec. 270 sec.
Remote inhibit test timer
NOTE: This timer is referred to as timer T21 in the ANSI
specification.
24 N/A N/A Reserved
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