Xblue Networks X-50 - Manual (Page 91)

XBLUE Networks 91
Web Programming
SIP
6
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Session Expires (sec): - The default, 3600 should be fine for most applications, however, with remote tele-
phones connected to a residential router, you may want to set this timer to 20 seconds.
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MIN SE: - (Minimum Session Expiration Time) is the amount of delay before signalling the X-50 gateway
that the Telephone Session Timer has expired. The X-50 gateway will then communicate with the
telephone and establish a new initial invite request. This timer should be set to zero and not be changed.
Optional SIP Header
Some SIP Gateways require different SIP headers. The X2020 telephones are equipped to handle two different
headers, when needed.
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Optional Header1: - Enter the required optional header information.
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Optional Header2: - Enter the required optional header information.
RTP Parameters
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RTP Port Base: - Enter the base port to be used for the (Real-time Transport Protocol).
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Enable Statistic: - Click on the Check Box to enable the statistic RTP server.
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Statistic Server: - Enter the statistic server IP Address.
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Statistic Port: - Enter the statistic port that will be used for the RTP server.
Codec Settings
A Codec is a coding and decoding protocol that allows two devices to transmit information between them using an
agreed upon protocol. A commonly used codec is G.711, which has no compression but delivers the best sound
reproduction and it also uses the most bandwidth. The X2020 telephone can, on the fly, change codecs to match the
other device; making it extremely flexible. The X-50 gateway will, in descending order, try to use the codec that is
set to “First” then “Second” then “Third” and so on, until a match is found. Once a match is found the connection is
established.
Caution:
Changing this parameter may cause erratic operation.
Caution:
Changing this parameter may cause erratic operation.