Cortelco 2757 - Manual (Page 22)

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4. Press ‘Up’ or ‘Down’ until ’14. SIP Proxy’ is selected, then press ‘Select’. Use the numeric
keypad to enter the IP address of your SIP proxy. After the IP address is entered, press
‘Save’ to keep changes, or ‘Cancel’ to discard.
5. Press ‘Down’ until ’15. SIP PortNum’ is selected, then press ‘Select’. Enter the SIP server’s
port number. By default this is ‘5060’. After the Port Number is entered, press ‘Save’ to
keep changes, or ‘Cancel’ to discard.
6. Press ‘Down’ until ’16. SIP Username’ is selected, then press ‘Select’. Use the numeric
keypad to enter your SIP username. After the SIP Username is entered, press ‘Save’ to
keep changes, or ‘Cancel’ to discard.