User manual

8820IP Phone User Manual_ SIP (V1.44)

● dtmf: Set DTMF signal sending way by selecting inband audio, rfc 2833

and sip info from list box.

● dtmf payload : When DTMF select rfc 2833.This parameter can be used

indicating type of RTP payload type. The value can be use integer

96-101.

● prack: Enable/disable support pre-ack(RFC3262) by checking/clearing

this box.

● super password: Set the super password of the phone.(Default super

password is 12345678).

● debug: Set the debug level of the phone.

n disable: Disable output the debug message by selecting this item.

n output: Output the operation information to the window, such as

n output all: Output all debug information and data in test window by

selecting this item.

n remote debug: Save the debug information in SDRAM of IP phone by

selecting this item.

n no check: Disable checking firmware tags when upgrading. This is not

suggested, because it will increase the risk of upgrading the wrong

firmware into the phone.