Avaya Configuring Dial Services Bedienungsanleitung Seite 28

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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 routers 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
Dial-up line
Dial-up line
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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