Voice Over IP

SUBSCRIBER SYSTEMS

Subscriber-type systems are available that use the same operations as those systems that operate in the telephone network. These systems are also software programmable for voice and data circuits. The main difference is that one terminal is located in the central office while the other is in the field near or on the customer's location (see Figure A-6). They also may be referred to as a pair gain system, a digital loop carrier, or a subscriber loop carrier. Some of them can also extend a leased digital link to the customer premise for his/her own use.

Subscriber-type systems support a wide variety of applications by various operating companies. One of the more popular uses is providing service to developing areas for new subdivisions ...