Avaya Configuring Dial Services Manual do Utilizador descarregar pdf (Página 28)

Configuring Dial Services

1-2

All three dial services work over any public, switched network such as the

standard telephone network, a switched 56 Kb/s network, and an Integrated

Services Digital Network (ISDN) (Figure 1-1).

Figure 1-1. Example of Dial Access to a Switched Telephone Network

The router initiates, monitors, and terminates dial-on-demand, dial backup, and

bandwidth-on-demand connections using a dial device (modem, ISDN terminal

adapter) that supports Raise DTR or V.25bis signaling, or a router with an internal

ISDN interface connected to an ISDN network. An internal ISDN interface

eliminates the need for external dial devices. If the router has built-in ISDN

capability, you can connect to an ISDN network directly.

Note:

Basic Rate Interface (BRI) service requires a network terminator 1

(NT1) to connect to an ISDN network. The router’s built-in BRI module does

not include an internal NT1, so you or your service provider must supply the

NT1.

Modem

DSU/CSU

Router

Dial-up line

*You only need a terminal adapter if your router does not have built-in ISDN capability.

If your router has an IDN/BRI module or an MCT1 or MCE1 Link Module installed,

along with ISDN software, you can connect to an ISDN network directly.



Terminal*

Adapter

PSTN

Switched

56K

ISDN

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Avaya Configuring Dial Services Manual do Utilizador Página 28