Welltech LP-803 v.3.07 - Manual (Page 58)

LAN Phone 803
User Manual
Welltech Technology Co., Ltd.
58 / 90 2014/07/22
Item Explanation
register SIP Server or IP-PBX server.
This column can only enter numbers; maximum length is 4 bytes with
the range of 5~3600 (seconds).
SIP Session Timer
T1 Default: 1000 ms; Set up round-trip time (RTP) estimate.
This column can only enter numbers; maximum length is 4 bytes with
the range of 500~2000.
*This function must be supported by Server.
SIP Session Timer
T2 Default: 8000 ms.
Set up the maximum retransmit interval for non-INVITE requests and
INVITE responses.
This column can only enter numbers; maximum length is 5 bytes with
the range of 4000~16000.
*This function must be supported by Server.
SIP Session Timer
B, F, H Default: 32000 ms.
Set up the maximum retransmit interval for non-INVITE requests and
INVITE responses.
This column can only enter numbers; maximum length is 6 bytes with
the range of 8000~128000.
B: 64 * SIP T1; INVITE transaction timeout timer。
F: 64 * SIP T1; non-INVITE transaction timeout timer。
H: 64 * SIP T1, Wait time for ACK receipt.
*This function must be supported by Server.
For example, if T1 is 500 ms, T2 is 4 seconds and B,F,H is 32 seconds,
then non-INVITE retransmissions occur at intervals of 500 ms, 1s, 2s,
4s, 4s, 4s, 4s, 4s, 4s, 4s. This means that retransmissions occur with
an exponentially increasing interval that caps at T2. In this particular
scenario, there are 10 retransmissions which is a total of 11 requests
from UAC.
SIP INVITE
Timeout Default: 30000 ms; Set up SIP Invite, If how long do not respond,
enter the failed state. This column can only enter numbers; maximum
length is 5 bytes with the range of 8000~64000.
Local SIP Port Default: 5060~5060.
Set up the Start and End SIP Port Range of phone 1.
This column can only enter numbers; maximum length is 5 bytes with
the range of 1024~40000.。
If you want to Set up a fixed port, please Set up the same value of Start
and End Port.
If you want to Set up a range, the left column is Start Port, the right
Port is End Port.
Local RTP Port Default: 20000~21999.
Set up the Start and End RTP Port Range of phone 1.
This column can only enter numbers; maximum length is 5 bytes with
the range of 1024~40000.
If you want to Set up a fixed port, please Set up the same value of Start
and End Port.
If you want to Set up a range, the left column is Start Port, the right