R2511-HP MSR Router Series Voice Configuration Guide(V5)
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To configure SIP compatibility for fax pass-through and modem pass-through:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter SIP client view.
sip N/A
4. Configure SIP compatibility
for fax pass-through and
modem pass-through.
sip-comp { t38 | x-parameter } *
By default, the compatibility
options are not carried in re-INVITE
requests.
Configuring the parameter for communicating with a VCX device
A VCX device manages various licenses corresponding to different types of telephones, such as basic
phone, and business phone. Phones of different types use different licenses.
To enable the VCX device to differentiate phone types, configure the Contact header fields of REGISTER
messages sent to the VCX device to contain the dt parameter, which specifies the device (phone) type.
To configure the parameter for communicating with a VCX device:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter SIP client view.
sip N/A
4. Configure the Contact header
fields of the REGISTER
messages to contain the dt
parameter.
sip-comp dt
By default, the Contact header
fields of the REGISTER messages
do not contain the dt parameter.
Configuring user-agent and server header fields
The User-Agent header field can contain the product name and product version number of the UAC in a
SIP request message, while the Server header field can contain the product name and product version
number of the UAS in a SIP response message. Revealing the specific software version of the user agent
and server might allow the user agent and server to become more vulnerable to attacks against software
that is known to contain security holes. Therefore, it is stipulated in RFC 3261 that the User-Agent header
field and the Server header field should both be a configurable option.
Configuration prerequisites
If a SIP server is used to forward calls, complete the configurations on the SIP server.
Configuration procedure
To configure User-Agent and Server header fields:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter SIP client view.
sip N/A