Voice Basics
In Telecom basically we have two types of voice signals:
Analog and Digital.
Analog are of two types: Loop start and Ground Start
Loop Start is sued in home environment.
Ground start is used in PBX environment , it fixes the problem of glare.
Digital Signals are of two types:
Channel associated signaling (CAS): Signaling information is transmitted using
the same bandwidth as the voice.
■ Common channel signaling (CCS): Signaling information is transmitted using a
separate, dedicated signaling channel. ( If used with T1 only 23 channels can be used).
There are two types of Digital lines:
T1 24 channels and used in America and Japan
E1 32 channels (only 30 can be used) used in rest of the world.
Analog and Digital.
Analog are of two types: Loop start and Ground Start
Loop Start is sued in home environment.
Ground start is used in PBX environment , it fixes the problem of glare.
Digital Signals are of two types:
Channel associated signaling (CAS): Signaling information is transmitted using
the same bandwidth as the voice.
■ Common channel signaling (CCS): Signaling information is transmitted using a
separate, dedicated signaling channel. ( If used with T1 only 23 channels can be used).
There are two types of Digital lines:
T1 24 channels and used in America and Japan
E1 32 channels (only 30 can be used) used in rest of the world.
Comments
Post a Comment