V400 Series VoIP Gateway User Guide
11
YML832 Rev1
Rear Panel
V440 (4 FXS ports)
Phone1-Phone4 are telephone ports (FXS) to be connected
to telephone sets or PBX CO ports.
V404 (4 FXO ports)
Line1-Line4 are line ports (FXO) to be connected to PSTN
(telephone lines from PSTN network.)
V422 (2 FXS + 2 FXO ports)
Phone1-Phone2 are telephone ports (FXS), and Line1-Line2
are line ports (FXO). Before the power is connected or in the
event of a power failure, Phone1 will be relayed to Line1,
and Phone2 to Line2 to reach the PSTN network.
V431 (3 FXS + 1 FXO ports)
Phone1-Phone3 are telephone ports (FXS), and Line1 is
a line port (FXO). Before the power is connected or in the
occasion of a power failure, Phone1 will be relayed to Line1
so that voice service is still available for Phone1.
