User manual

8820IP Phone User Manual_ SIP (V1.44)

device alive. “nat ttl” is an integer between 10 and 65535, default value is

20.

● phone number: The local phone number or username of this phone,

usually is allocated by system.

● account: With SIP system which requires authentication, please put the

username/account into this field.

● pin: With SIP system which requires authentication, please put the

password into this field.

● register port: The local UDP port registered with server to accept

incoming handshaking messages. The default port number is 5060.

● rtp port: RTP port is the port transferring and receiving voice packets

using UDP protocol. This is an even number between 1024 and 65535.

● tos: Set the TOS field of the IP header of the RTP packets. The bigger

this value is 0, the higher priority the packet is 224.

● outbound proxy : Enable/disable Outbound proxy by checking/clearing

this box. If the system has an Outbound Proxy，please set the URI of the

Outbound proxy into “sip proxy” and set the domain name of SIP proxy

server into “domain/realm”. The default service port is 5060.