Cisco Cisco IOS Software Release 12.4(4)T

Router(config)# voice service voip

Enters voice service configuration mode and specifies VoIP 
encapsulation.

Router(config-voi-serv)# modem relay latency 

250

Specifies the estimated one-way delay across the IP 
network.

Range is 100 to 1000. Default is 200.

 sse redundancy interval 

Router(config-voi-serv)# modem relay sse 

redundancy interval 25

Specifies the timer value for redundant transmission of 
SSEs. 

Range is 5 to 50 ms. Default is 20.

 sse redundancy packet number

Router(config-voi-serv)# modem relay sse 

redundancy packet 2

Specifies the SSE packet transmission count before 
disconnecting. 

Range is 1 to 5 packets. Default is 3.

 sse t1 milliseconds

Router(config-voi-serv)# modem relay sse t1 

2100

Specifies the repeat interval, in milliseconds (ms), for initial 
audio SSEs used for resetting the SSE protocol state 
machine (clearing the call) following error recovery. 

Range is 500 to 3000 ms. Default is 1000.

 sse retries value

Router(config-voi-serv)# modem relay sse 

retries 5

Specifies the number of SSE packet retries, repeated every 
t1 interval, before disconnecting. 

Range is 0 to 5. Default is 5.

 sprt retries value

Router(config-voi-serv)# modem relay sprt 

retries 10

Specifies the number of SPRT packet retries, repeated every 
t1 interval, before disconnecting. 

Range is 0 to 10. Default is 10.

 

Router(config-voi-serv)# modem relay sprt v14 

receive playback hold-time 32

Configures the time, in ms, to hold incoming data in the 
V.14 receive queue. 

Range is 20 to 250. Default is 50.

Router(config-voi-serv)# modem relay sprt v14 

transmit hold-time 12

Configures the time to wait, in ms, after the first character 
is ready before sending the SPRT packet. 

Range is 10 to 30. Default is 20.