Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
530
Result: The target characters %5F remain the same.
Parameter sip.reserve_characters
<y0000000000xx>.cfg
Description
It specifies the characters that the phone does not recognize as the escape one.
Multiple characters are not separated.
Permitted
Values
String
Default
Blank
Supported
Devices
All phones except T48G, T46G, T42G, T41P and T29G
Related
Parameters
sip.escape_characters.enable
Parameter sip.tcp_port_random_mode
[2]
<y0000000000xx>.cfg
Description It configures the listening port mode.
Permitted
Values
0-random source port (non 506x), fixed ports (506x) carried in the Contact, Via header.
1-random source port (non 506x) and other ports (non 506x) carried in the Contact, Via header.
Default
1
Parameter sip.listen_mode
<y0000000000xx>.cfg
Description It configures the listening mode.
Permitted
Values
0-according to the transport protocol
1-listening TCP and UDP
2-listening TCP and UDP, and subscribe for BLF List containing transport=TCP in the Contact header.
Default
0
Parameter sip.send_response_by_request
<y0000000000xx>.cfg
Description
It configures where the IP phone retrieves the destination address for response. The phone will then
send all SIP response messages to the destination address.
Permitted
Values
0-from VIA header in the request message
1-from source address of the request message
Default
1
Parameter sip.requesturi.e164.addglobalprefix
<y0000000000xx>.cfg
Description It enables or disables the phone to add a global prefix "+" to the E.164 user parts in SIP: URI.
Permitted
Values
0-Disabled
1-Enabled, the phone will automatically add a prefix "+" to the number in the E.164 format when you
dial using the SIP URI (for example
).
Default
0
Parameter sip.send_keepalive_by_socket
<y0000000000xx>.cfg
Description
It enables or disables the phone to send the keep-alive packets based on the transport protocol.
Note: It works only if "account.X.nat.udp_update_enable" is set to 1 (Default).
Permitted
Values
0-Disabled, the phone sends the keep-alive packets based on the account
1-Enabled
