R2511-HP MSR Router Series Voice Command Reference(V5)

206
[Sysname-voice] sip
[Sysname-voice-sip]
sip-comp
Use sip-comp to configure SIP compatibility.
Use undo sip-comp to restore the default.
Syntax
sip-comp { callee | dt | from | substitute | t38 | x-parameter } *
undo sip-comp { callee | dt | from | substitute | t38 | x-parameter } *
Default
• The destination number is obtained from the request-line, which is the start line in an SIP request
message.
• The From header field contains the source address and the To header field contains the destination
address.
• The compatibility options are not carried in re-INVITE requests.
• The Contact header fields of REGISTER messages do not contain the dt parameter.
• The number substitution function is disabled.
Views
SIP client view
Default command level
2: System level
Parameters
callee: Configures the device to use the destination number in the To header field for sending a SIP
request.
dt: Configures the Contact header fields of the REGISTER messages to contain the dt parameter. This
keyword is used when the device communicates with a VCX device.
from: Configures 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 for interoperability with other
vendors. By default, the From header field contains the source address and the To header field contains
the destination address.
substitute: Enables the number substitution function. With this keyword provided, the device replaces the
pound sign in called numbers with the ASCII code %23 for outgoing calls, and replaces the ASCII
code %23 in called numbers with a pound sign for incoming calls. Moreover, the device replaces the
pound sign in the called number with the ASCII code %23 in the Contact header field of any subsequent
request and response. The translated called number is limited in length. If a translated called number
contains more than 31 digits, only the first 31 digits are sent. With this length limitation, the device cannot
replace all pound signs in a called number. For example, the number
123456789012345678901234567##89 is translated to 123456789012345678901234567%23.
t38: When a SIP standard T.38 fax operation is performed, 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.