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Table 248 Configuration items
Item Description
The devices of some vendors do not strictly follow the SIP protocol. To interoperate with such devices, you
must configure the SIP compatibility options.
Use the address in the
To header field as the
address in the From
header field
• Enable—Configure the device to use the address (IP address or DNS
domain name) in the To header field as the address in the From header
field when sending a SIP request.
• Disable—Do not use the address in the To header field as the address in
the From header field. That is, the From header field contains the source
address and the To header field contains the destination address.
By default, the SIP compatibility function is disabled.
Source of the Called
Number
Configure the source of the called number.
• Request-Line Header Field—Get the called number from the
Request-Line header field.
• To Header Field—Get the called number from the To header field.
By default, the called number is obtained from the request-line, which is the start
line in an SIP request message.
SIP Fax and Modem
Pass-through
• Carry the x-param compatibility option:
If the device receives a re-INVITE request with the a=X-modem field, it
will reply with a 200 OK response carrying the a=X-modem field in the
SDP field.
If the device receives a re-INVITE request with the a=X-fax field, it will
reply with a 200 OK response carrying the a=X-fax field.
When the device initiates a fax pass-through operation, the a=X-fax
field is carried in the re-INVITE request. When the device initiates a
modem pass-through operation, the a=X-modem field is carried in the
re-INVITE request.
• Compatible with T.38 fax: the device can recognize T.38-specific
description fields, and fax parameters T38FaxTranscodingJBIG,
T38FaxTranscodingMMR, and T38FaxFillBitRemoval, which are in the
SDP fields of the re-INVITE requests and 200 OK responses, do not
contain :0.
By default, the compatibility options are not carried in re-INVITE requests.
UAC Product Name Specify the product name of the UAC.
UAC Product Version Specify the product version of the UAC.
UAS Product Name Specify the product name of the UAS.
UAS Product Version Specify the product version of the UAS.
Configuring advanced settings
Registration timers are available to SIP trunk accounts. For information about SIP trunk, see
"Configuring SIP trunk."
Configuring the address hiding mode
1. Select Voice Management > Call Connection > SIP Connection from the navigation tree.
2. Click the Advanced Settings tab.
The page for configuring advanced settings appears.
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