User`s manual

Chapter 1 - Using the AT-VP504E FXS User’s Manual (SIP/MGCP Version)
AT-VP504E FXS 6
A SCN user can also contact the AT-VP504E FXO gateway, which in
turn contacts the AT-VP504E FXS, then reaches the corresponding
phone/fax.
Calls Without a SIP Server
If the AT-VP504E FXS is not configured to register with a SIP Server
3
,
you can make SCN to IP network calls by dialing an IP address.
X IP Address Call
You can dial another communication unit (gateway or terminal) without
the help of a SIP Server by entering its IP address. If you are dialing
the IP address of an AT-VP504E FXS (which has four ports), by
default, you will reach the telephone/fax connected to Port 1 of this 4
ports terminal.
3. Only valid for units that run the SIP signalling protocol.
IP / LAN
Telephone
AT-VP504E FXS
Fax
IP Communication Server
PSTN Phone
PSTN
4 telephone lines
connected to the PSTN
AT-VP504E FXO
(Gateway)
IP / LAN
Telephone Telephone
AT-VP504E FXS AT-VP504E FXS
Fax Fax
y IP phone
y Soft Phone
SIP User Agent
Note: This type of dialing can only be possible if the AT-VP504E FXS
is not configured to register with a SIP Server.