DWG2000E/F/G GSM/CDMA VoIP Gateway User Manual
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Shenzhen Dinstar Technologies Co., Ltd.
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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 10-3600s.
Keepalive SIP ID
This field specifies SIP ID of OPTION. The format would be <xxx@host.com >,
example:
OPTIONS
sip:heartbeat@172.16.0.8:2080 SIP/2.0
Via: SIP/2.0/UDP 172.16.222.22;branch=z9hG4bK45c4f8d2026d9eed8a0adcd533161efd;
From:
<sip:heartbeat@172.16.222.22:2080>
;tag=6d48f0a169d33fe7b032c0fd895084fd
To:
<sip:heartbeat@172.16.0.8:2080>
Call-ID: 8874a4e49f11af243c6b717c05a16e35@172.16.222.22
CSeq: 1804289386 OPTIONS
Contact: <sip:31@172.16.222.22>
Max-Forwards: 70
Accept: application/sdp
Content-Length: 0
Keepalive Retry Count
This field specifies re-transmission times for OPTION message. Its value range from
1-10 times.
Configuring Caller ID and 183 Mode