AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 41

Introduction
Table 1-1. -
Tie
FX
WATS
DID
Trunk pools
ARS
ICOM
buttons
SA buttons
Line buttons, that is, outside
trunks assigned to buttons
on telephone
Shared trunks
Prime Lines
Queued Call Console (QCC)
Number of extensions:
<5(3
>50
FCC
registration
Mode
Key
A Key system is the simplest way to provide users with more than one line from
a single telephone. Older Key systems have telephones that look like single-line
telephones except for a row of buttons, illuminated by incandescent lights when
active, across the bottom. The leftmost button is labeled Hold, and the other
buttons are labeled with telephone numbers.
When the communications system operates in Key mode, telephones are
programmed with two kinds of buttons:
Line buttons (or keys) are associated with specific outside (telephone
company) trunks. Line buttons allow users to see activity on other
telephones, join conversations, and make and receive calls.
Intercom buttons are used to make and receive internal calls.
Continued
Key
Yes
Yes
Yes
No
No
No
Yes
No
Yes
Yes
(outside trunks
only)
No
No
Good
Not recommended
KF or
Hybrid/PBX
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
(outside trunks
and SA buttons)
No
Yes
Good
Good
MF
MF or PF
Modes of Operation
Behind Switch
Yes
Yes
Yes
No
No
No
Yes
No
Yes
Yes
(outside trunks
only)
Yes
No
Good
Good to 80
up
KF or MF
1-13