WG3100-Series GSM VoIP Gateway User Manual
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Techroutes Network Pvt. Ltd.
54
DNS query type
The DNS query type defines the type of information that will be requested from DNS server
DNS refresh interval
The interval of DNS refresh, Range from 0 to 60000 mins, 0 means disable default value is disable.
Configuring SIP Timers
T1
This field specifies the lowest value, in milliseconds, of the retransmission timer for SIP messages. Default specifies 500.
T2
This field specifies retransmission timer for T1 timeout of SIP message, in milliseconds. Default specifies 4000.
T4
This field specifies retransmission timer for T2 timeout of SIP message, in milliseconds. Default specifies 5000.
TMAX
This field specifies maximum timeout value for SIP message. The SIP message will be dropped after TMAX. Default
value is 32000
Keepalive Interval
The gateway can monitor the status of SIP server by sending periodic SIP OPTION messages. This field specifies
transmission timer of OPTION message. Its range from 32-3600s.