Yealink SIP-T3 Administrator's Manual page 601

Administrator's Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
Description It configures the listening port mode.
0-random source port (non 506x), fixed ports (506x) carried in the Contact, Via header.
Permitted
Values
1-random source port (non 506x) and other ports (non 506x) carried in the Contact, Via header.
Default 1
Parameter sip.listen_mode
Description It configures the listening mode.
0-according to the transport protocol
Permitted
1-listening TCP and UDP
Values
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
It configures where the IP phone retrieves the destination address for response. The phone will then
Description
send all SIP response messages to the destination address.
0-from VIA header in the request message
Permitted
Values
1-from source address of the request message
Default 1
Parameter sip.requesturi.e164.addglobalprefix
Description It enables or disables the phone to add a global prefix "+" to the E.164 user parts in SIP: URI.
0-Disabled
Permitted
1-Enabled, the phone will automatically add a prefix "+" to the number in the E.164 format when you
Values
dial using the SIP URI (for example 862512345000@sip.com).
Default 0
Parameter sip.send_keepalive_by_socket
It enables or disables the phone to send the keep-alive packets based on the transport protocol.
Description
Note: It works only if "account.X.nat.udp_update_enable" is set to 1 (Default).
0-Disabled, the phone sends the keep-alive packets based on the account
Permitted
Values
1-Enabled
Default 1
Parameter sip.sdp_early_answer_or_offer
It enables or disables the phone to generate an SDP Offer or Answer message when receiving a reli-
Description
able provisional response or PRACK request and response.
Permitted 0-Disabled
1-Enabled
Values
Default
0
Parameter sip.reliable_protocol.timerae.enable
It enables or disables the timer for ict and nict when TCP protocol is used.
Description
Note: This parameter can be used for fast failover purpose when TCP connection fails.
Permitted 0-Disabled
1-Enabled
Values
595
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<y0000000000xx>.cfg
<y0000000000xx>.cfg