Avaya Configuring Dial Services Manual do Utilizador Página 34

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Configuring Dial Services
1-6
117353-B Rev. 00
Figure 1-2. Dial-on-Demand Service
Demand Lines and Pools
Demand lines provide the physical connections over which the demand circuits
transmit and receive data. To maximize the number of circuits that can be active
simultaneously, you establish a demand pool.
A demand pool is a group of one or more lines that reside in the same slot on the
router. You identify each demand pool by assigning a demand pool ID. Lines in a
demand pool can connect to a modem, directly to a PSTN (using the ARN with
the V.34 Modem Adapter Module), or directly to an ISDN network (using a router
with internal ISDN capability).
You can combine asynchronous, synchronous, and ISDN interfaces in a single
pool. The synchronous interfaces can use Raise DTR or V.25bis signaling for
modem connections. The asynchronous interfaces can use Raise DTR, V.25bis, or
Hayes signaling for modem connections. Hayes signaling requires that you use AT
modem commands to send dialing instructions to the modem. The ISDN lines use
ISDN signaling for network connections.
Dial
device
Dial
device
Los Angeles
Chicago
Dallas
New York
Demand pool:
Slot 2
Back of
router
Data arrives at the New York router, but the final destination
is Dallas. A port in the demand pool transmits the data.
DS0013A
Dial
device
Dial
device
Dial
device
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