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Configuration Parameters
492
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
Default
1
Parameter sip.sdp_early_answer_or_offer
<y0000000000xx>.cfg
Description
It enables or disables the phone to generate an SDP Offer or Answer message when receiving a reli-
able provisional response or PRACK request and response.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter sip.reliable_protocol.timerae.enable
<y0000000000xx>.cfg
Description
It enables or disables the timer for ict and nict when TCP protocol is used.
Note: This parameter can be used for fast failover purpose when TCP connection fails.
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