Installation guide

Synapse Installation Guide Back to Contents
Installation 24
Figure 8. Station Port (FXS) Door Phone Connection
Trunk Port (FXO) Door Phone Support
You can connect a Trunk Port (FXO) door phone to any one of the four Line (FXO) ports
on a Synapse SB67010 PSTN Gateway as shown in Figure 9. The FXO door phone can be
configured to call either a single extension or a group of extensions (a Ring Group). You
can use the WebUI to configure an FXO door phone. For more information, see
“Configuring a Trunk Port (FXO) Door Phone” on page 85.
In Call Appearance mode, Synapse requires a dedicated door phone line to be Trunk
Reserved to a spare Deskset in order for other Desksets not to seize that line for
outbound calls. If there are no extra Desksets available for Trunk Reservation, the door
phone should be connected to the last, or closest to last, line of the last Gateway to limit
the chance of the door phone line being seized.
In Line Appearance mode, the Deskset user must be aware not to use the assigned line
key for regular outbound telephone calls. Desksets automatically select a line when
going off-hook, so the Deskset will seize an assigned door phone line if all other lines
are busy.
Figure 9. Trunk Port (FXO) Door Phone Connection
ATA FXS 1 & FXS 2
FXS Door Phone
FXO Door Phone
Bypass Phone
PSTN Gateway #1
FXO Lines 1–4
PSTN Gateway #2
FXO Lines 5–8
PSTN Telephone Connections