AT&T MERLIN LEGEND Release 3.0 System Programming And Maintenance Manual page 115

Glossary
N
network
network interface
O
off-hook
off-premises telephone
ones density
on-hook
Configuration of communications devices and
software connected for information
interchange.
Hardware, software, or both that links two
systems in an interconnected group of
systems, for example, between the local
telephone company and a PBX.
Telephone is said to be off-hook when the user
has lifted the handset, pressed the Speaker
button to turn on the speakerphone, or used a
headset to connect to the communications
system or the telephone network.
See OPT.
Requirement for channelized DS1 service to
the public network that eight consecutive zeros
cannot occur in a digital data stream.
Telephone is said to be on-hook when the
handset is hung up, the speakerphone is
turned off, and the user is not using a headset
to connect to the communications system or
the telephone network.
System Programming and Maintenance (SPM) GL-25