Yealink SIP-T2 Series Administrator's Manual page 206

Administrator's Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
It configures the port of SIP server Y.
If it is set to 0 when UDP is used ("account.X.sip_server.Y.transport_type" is set to 0), the phone uses a ran-
dom port for responding the messages from the server.
Description
Example:
account.1.sip_server.1.port = 5060
Permitted
Integer from 0 to 65535
Values
Default 5060
Web UI Account->Register->SIP Server Y->Port
Parameter account.X.outbound_proxy_enable
Description It enables or disables the IP phone to send requests to the outbound proxy server.
Permitted
0-Disabled
Values 1-Enabled
Default 0
Web UI Account->Register->Enable Outbound Proxy Server
T54S/T52S/T48S/T48G/T46S/T46G/T29G:
Menu->Advanced (default password: admin)->Accounts->Outbound Status
Phone UI
T42G/T42S/T41P/T41S/T40P/T40G/T27G/T23P/T23G/T21(P) E2/T19(P) E2/CP920:
Menu->Settings->Advanced Settings (default password: admin)->Accounts->Outbound Status
Parameter account.X.outbound_proxy.Y.address
It configures the IP address or domain name of the outbound proxy server Y.
Example:
Description
account.1.outbound_proxy.1.address = 10.1.8.11
Note: It works only if "account.X.outbound_proxy_enable" is set to 1 (Enabled). To use an outbound
proxy server address, "account.X.sip_server.Y.outbound_proxy_enable" should be set to 1 (Enabled).
Permitted
IP address or domain name
Values
Default Blank
Web UI Account->Register->Outbound Proxy Server Y
T54S/T52S/T48S/T48G/T46S/T46G/T29G:
Menu->Advanced (default password: admin)->Accounts->Account X->Outbound ProxyY
Phone UI
T42G/T42S/T41P/T41S/T40P/T40G/T27G/T23P/T23G/T21(P) E2/T19(P) E2/CP920:
Menu->Settings->Advanced Settings (default password: admin)->Accounts->Outbound ProxyY
Parameter account.X.outbound_proxy.Y.port
It configures the port of the outbound proxy server Y.
Description Example:
account.1.outbound_proxy.1.port = 5060
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<MAC>.cfg
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<MAC>.cfg
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<MAC>.cfg