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A T-1 also can be used as an efficient way to deliver analog
phone services, but to do this, an additional piece of equipment, a
channel
bank, is necessary
to convert the digital T-1 signals to 24 analog telephone lines.
This can be useful if you need to configure many centrally located
dial-up ports, into which roving users will dial into with analog
modems. The Cisco AS-5200 has a built-in channel bank and modems so
that simply by connecting a single T-1 connector to it, you can have
up to 24 modem calls answered simultaneously. In fact, the AS-5200
is even a little more clever than that. The AS-5200 also has a
built-in T-1 multiplexer, giving it hybrid functionality for call
answering. This means that if you connect a T-1 configured as a PRI
to an AS-5200, the AS-5200 will autodetect if the incoming call is
from a digital ISDN or analog caller and will answer the call with
the appropriate equipment. |
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