Specifications

Page 20–2
FOCUS System Manual
Here’s how it works:
The network operates on a “first come, first
served” basis, allowing one station-to-station call
at a time. This means that the first person to pick
up one of the phones on the network will hear the
network dial tone and be able to place a call as
described below. Someone picking up one of the
other phones before that first person hangs up will
get a busy signal and be unable to place a call —
except to use the “break-in” feature described
below.
This is because the (network) line becomes busy
as soon as someone lifts the handset at any station
on the network. The line remains busy until all
phones on the network have been hung up.
If one of the phones on the network is inadver-
tently left off the hook, the system’s “timeout”
feature kicks in after ten (10) seconds. This frees
up the remaining stations on the network for
normal service. The phone that is off the hook will
continue to emit a busy signal until it is hung up.
Likewise, anyone dialing that number while the
phone is off the hook will get a busy signal.
To place a call from one station on the network
to another, lift the handset from the cradle. When
you hear the “network” dial tone, dial the three-
digit phone number for the station you want to
call. Once you have completed the call, simply
hang up (i.,e., replace the handset in the cradle) to
terminate the connection. To free the (network)
line for another call, the person at the other station
must also hang up the phone.
If you hear a busy signal when you lift the
handset, the (network) line is busy. Hang up and
try again later. If you need to make an emergency
call, use the “break-in” feature described below.
To break in on, or interrupt, an ongoing call (i.e.,
the line is busy when you pick up the phone), dial
“#00” (pound zero zero). This connects you to the
stations involved in the call.
This feature is provided for two reasons: emer-
gencies and conference calls. In an emergency,
Figure 20–1. Sample Internal Network within a FOCUS Ring Configuration.