Ovislink OV804WV User Manual page 208

bindaddr=192.168.1.237
address
other configuration line omitted here
[1001]
type=friend
secret=1001
host=dynamic
canreinvite=no
context=sip
corresponding context 'sip' in
extensions.conf
This sample configuration file only contains the information for
1001. To add other extension, simply add similar section in
SIP.conf.
Before rushing to next step, make sure Asterisk is running.
Configuring DSL Router SIP
DSL router's SIP configuration page is shown below. Domain,
proxy and registrar must be set to Asterisk's IP, and they are
the same. Extension and authentication credential must be the
same as what you set in SIP server. After basic filling is
complete, just click the buttons below to re-run SIP module to
make these settings take effect.
; extension
; password
; you must configure
204
; binding IP