Netgear XM128 ISDN User Manual Page 85

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Reference Guide for the Model XM128 ISDN Digital Modem
Analog Call Handling 8-3
Making and Receiving Analog Calls
This section explains the role of analog adapters in placing outgoing analog calls and receiving
incoming analog calls.
Placing a Call from the Analog Adapter
Making a call from the analog adapter is as easy as picking up the telephone connected to the
analog port and dialing. With a terminal program, you can also use the Model XM128 modem
to dial the number for you.
To place a call from the analog adapter, follow these steps:
1.
Type ATDB714-693-0808 (dial the number).
You should see this message:
CONNECT (Dialing is complete)
2.
Pick up the phone handset and wait for the remote device to answer.
3.
Use ATDAs (ATDBs) to place a call for the analog adapter 1 (analog adapter 2).
When the hook sensor of the analog adapter detects that the handset on the telephone device is
picked up (off hook), it sends a setup message to the ISDN central exchange to request a
connection. One B channel, if available, is assigned to this connection, and the exchange waits
for the dialed number to route the call. At the same time, a dial tone is presented to the adapter
port to prompt the user to dial. Both tone and pulse dialing are accepted.
A busy tone is heard on the handset if:
The B channel is unavailable.
The dialed number is undeliverable.
The called party is busy.
This busy tone indicates the failure of the attempt to connect. To place another call, hang up
the phone; then pick it up again. If the called party is alerted, a ring-back tone is heard.
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