HP FlexNetwork MSR Series Configuration Manual page 168

Configuration prerequisites
If a SIP server is used to forward calls, complete the configurations on the SIP server.
Configuring how to obtain the destination number and address
Step
1. Enter system view.
2. Enter voice view.
3. Enter SIP client view.
4. Configure the device to
obtain the destination
number from the To header
field for sending a SIP
request.
5. Configure the device to use
the address in the To header
field as the address in the
From header field.
Enabling the number substitution function
Devices from some vendors cannot recognize the pound sign (#) in call numbers.
To communicate with such devices, enable the number substitution function so that 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.
Typically, 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 might not
replace all
123456789012345678901234567##89 is translated to 123456789012345678901234567%23.
To enable the number substitution function:
Step
1. Enter system view.
2. Enter voice view.
3. Enter SIP client view.
4. Enable the number
substitution function.
Configuring SIP compatibility for fax pass-through and modem pass-through
When the device communicates with devices of other vendors, you can set the following options to
meet your network requirements. After the x-param compatibility option is configured:
•
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.
Command
system-view
voice-setup
sip
sip-comp callee
sip-comp from
pound signs in
Command
system-view
voice-setup
sip
sip-comp substitute
a called number.
155
Remarks
N/A
N/A
N/A
By default, the destination
number is obtained from the
request-line, which is the start line
in an SIP request message.
By default, the From header field
contains the source address, and
the To header field contains the
destination address.
For example, the
Remarks
N/A
N/A
N/A
By default, the number
substitution function is disabled.
number