3com MSR 20-20 참조 매뉴얼

By default, IP address is used.

# Set the domain name of the SIP device to hello.com.

<Sysname> system-view

[Sysname] voice-setup

[Sysname-voice] sip

[Sysname-voice-sip] sip-domain hello.com 

source-ip ip-address

SIP client view

ip-address: IPv4 address.

Use the source-ip command to configure the source IP address bound to the 
packets sent by the UA.

Use the undo source-ip command to remove the configuration.

By default, no source IP address is configured to be bound to the packets sent by 
the UA.

Note that the source IP address must be already assigned to a gateway interface.

You can use this command only when the SIP registration function is disabled.

# Specify 1.1.1.1 as the source IP address bound to the packets sent by the UA.

<Sysname> system-view

[Sysname] voice-setup

[Sysname-voice] sip

[Sysname-voice-sip] source-ip 1.1.1.1 

user username password { cipher | simple } password [ cnonce cnonce | realm 
realm ] *

SIP client view/POTS entity view

username: Username used for registration authentication, a string of 1 to 31 
case-sensitive characters. The characters """ and "" are invalid.