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SS7G2x Signaling Server SGW Mode User Manual Issue 4
5.3.3 SCTP-Specific Timers
SCTP-specific timers are given in Table 7.
5.4 Board Types
Table 8 shows the signaling board types.
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
Table 6. MTP3 ANSI Timers (Continued)
TO
Range
(milli-
seconds)
Default
(milliseconds)
Description
Table 7. SCTP-Specific Timers
TO
Range
(milliseconds)
Default
(milliseconds)
Description
1 100 to 500 500 Minimum retransmission timeout (RTO)
2 100 to 60000 2000 Maximum retransmission timeout (RTO)
3 T1 to T2 1000 Retransmission timeout RTO initial value
4 100 to 3000 1000 SCTP Heartbeat timer
Table 8. Board Types
BRDTYPE Description
SPCI2S-4-2
SS7G2x(DSC) Signaling board with 4 signaling links configured and 2 PCMs. Used when
configuring signaling boards with a SIGTYPE of SS7.
SPCI4-4-4
SS7G2x(DSC) Signaling board with 4 signaling links configured and 4 PCMs. Used when
configuring signaling boards with a SIGTYPE of SS7.
SS7HDP-64-4
SS7G2x(DSC) Signaling board with 64 signaling links configured and 4 PCMs. Used when
configuring signaling boards with a SIGTYPE SS7.