3-FTCU operating instructions
4.6 EST3 System Operation Manual
[3FTCUOP5.CDR]
Pending Call Counter
Connected Call Identificatio
Pending Call Identification
Connected Calls Counter
1 Calls Connected
1 Calls Pending
First FL stairwell
Figure 4-5: 3-FTCU Display - One Connected Call and One
Pending Call
Notice in Figure 4-5 that the calls connected counter
indicates one call connected, the first floor stairwell phone,
and the pending call counter decremented to show the one
remaining incoming call from the second floor stairwell
phone.
4. To add the second floor stairwell phone to the conversation,
press the Connect switch again. Because there is only one
call pending, there is no need to scroll through incoming
calls.
[3FTCUOP6.CDR]
Pending Call Counter
Connected Calls
Identification List
Connected Calls Counter
Reversed text indicates
the selected connected call
2 Calls Connected
0 Calls Pending
First FL stairwell
Figure 4-6: 3-FTCU Display, Two Connected Calls
The connected calls counter indicates that two phone circuits are
connected, and both calls now appear in the connected calls
identification list. The two stairwell phones and the 3- FTCU
master handset are connected together in a party line connection,
and may communicate with each other.
Up to five phone circuits can be connected in a party line
connection. A full complement of connected circuits is shown in
Figure 4-7.
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