AT&T 974 Telephone User Manual


 
Private lines
This feature allows you to set a private line (direct line) to the Line 4 jack of
each unit. In this case, all 16 units can have their own private lines, and the
connection of 16 units together adds up to a total of 19 telephone lines. The
chart below shows an example of how 16 extension are connected to add up
to 19 telephone lines.
NOTE: To program a private line in a line group, press E to begin
feature setup and then select SPECIALhOPTIONS. Enter the Line group
menu and select PRV to set the private line.
NOTE: If the unit (extension) is not set to PRV, the Line 4 status
indicator will be unable to display a correct line status.
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Expanding the phone system
Expanding the phone system
Intercom Extensions
Telephone Lines (TLs) in System
T
L1
T
L2 TL3 TL4 TL5 TL6 TL7 TL8 TL9 TL10 TL11 TL12 TL13 TL14 TL15 TL16 TL17 TL18 TL19
EXT 11 ✔✔✔✔
EXT 12 ✔✔✔
EXT 13 ✔✔✔
EXT 14 ✔✔✔
EXT 15 ✔✔✔
EXT 16 ✔✔✔
EXT 17 ✔✔✔
EXT 18 ✔✔✔
EXT 19 ✔✔✔
EXT 20 ✔✔✔
EXT 21 ✔✔✔
EXT 22 ✔✔✔
EXT 23 ✔✔✔
EXT 24 ✔✔✔
EXT 25 ✔✔✔
EXT 26 ✔✔✔
To L4 jack
TL4 to TL19 are private lines
To L1 Jack
To L2 Jack
To L3 Jack
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