AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 235

Data Communications Support
Idle Line Preference automatically selects the first available line for data
calls.
Last Number Dialed automatically places a call to the last number
dialed from that station. Dialing sequence must include dial-out code for
outside calls.
Personal Speed Dial allows quick dialing (a 2-digit code) of frequently
used numbers on 10-button phones. The dialing sequence requires a
dial-out code for outside calls.
NOTE:
Use this feature on telephones that have only 10 or fewer buttons. If
you have an MLX-20L telephone, you can program Personal
Directory entries instead of Personal Speed Dial codes. If you have
any other MLX or analog telephone, you can program Auto Dial
buttons. If you program Personal Speed Dial codes on telephones
with more than 10 buttons, you may delete features you have already
programmed onto buttons.
Pool Access to external transmission facilities (Hybrid/PBX Mode
only) allows data endpoint dialing to seize access to pool numbers
servicing outside lines and trunk.
Privacy prevents loss of data by ensuring that data transmission is not
interrupted accidentally. The Privacy feature is automatic for data calls
on digital data stations and on analog data stations with analog multiline
telephones. It is activated manually on all other analog data stations.
System Speed Dial allows quick dialing of numbers that are used often
and provide for data security. Dialing sequence requires a dial-out code
for outside calls.
NOTE:
Certain system (voice) features interfere with data connections. These
features should be disabled and include the following:
Voice Announce
Call Waiting
Automatic Callback
System Features Used For Data
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