Netgear XM128 QIG - Quick Install Guide - Page 62

Identifying Your Line Provisioning

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Reference Guide for the Model XM128 ISDN Digital Modem 3. Enter AT&WZ (if you want to save the setting). After these commands are entered, the ATD command generates two consecutive setup messages to invoke bundle initiation. For the Northern Telecom switch, each BRI phone number can be called only once at any given time. So if you dial this number, it reports busy to any other incoming calls. In order to use two B channels for aggregation, you must place two calls with different phone numbers. To place these calls, separate the two numbers with a plus (+) sign after the ATD command. For bundling calls with the Northern Telecom switch, enter the following commands: ATDI[phone_number_1]+[phone_number_2] 4. Press [Enter]. The answering Model XM128 modem determines that the call is a bundle request: when AT&J3 is set and two consecutive setup messages are received. The two data calls are established as one message. The phone company's ISDN line splits it off into two messages. That is, the ISDN network treats the messages as two independent calls. Finally, the receiving side receives one bundled message into the computer's serial port. The success of a bundle connection initiation is indicated by the connect message reported to the DTE. The following two examples are of connect messages: CONNECT 115200/V120M 128K/LAPD or CONNECT 115200/V120M 128K/LAPD/V42b (with data compression) If you are not using American ISDN, you have a choice between Multiple Link Protocol (MLP) or cFos channel bundling (CCB), two bundle protocols. You can set it by the following commands: ATS100=0 (for MLP channel bundling) ATS100=1 (for CCB channel bundling) Identifying Your Line Provisioning For bundled connections, the two B channels of your ISDN line must be able to handle data circuit switch connections with unrestricted 64 Kbps or 56 Kbps line speeds. Two separate data calls can be established consecutively. 6-14 ISDN Overview

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Reference Guide for the Model XM128 ISDN Digital Modem
6-14
ISDN Overview
3.
Enter AT&WZ (if you want to save the setting).
After these commands are entered, the ATD command generates two consecutive setup
messages to invoke bundle initiation.
For the Northern Telecom switch, each BRI phone number can be called only once at any
given time. So if you dial this number, it reports busy to any other incoming calls. In order to
use two B channels for aggregation, you must place two calls with different phone numbers.
To place these calls, separate the two numbers with a plus (+) sign after the ATD command.
For bundling calls with the Northern Telecom switch, enter the following commands:
ATDI[phone_number_1]+[phone_number_2]
4.
Press [Enter].
The answering Model XM128 modem determines that the call is a bundle request: when AT&J3 is
set and two consecutive setup messages are received. The two data calls are established as one
message. The phone company’s ISDN line splits it off into two messages. That is, the ISDN
network treats the messages as two independent calls. Finally, the receiving side receives one
bundled message into the computer’s serial port.
The success of a bundle connection initiation is indicated by the connect message reported to the
DTE. The following two examples are of connect messages:
CONNECT 115200/V120M 128K/LAPD
or
CONNECT 115200/V120M 128K/LAPD/V42b (with data compression)
If you are not using American ISDN, you have a choice between Multiple Link Protocol (MLP) or
cFos channel bundling (CCB), two bundle protocols. You can set it by the following commands:
ATS100=0
(for MLP channel bundling)
ATS100=1
(for CCB channel bundling)
Identifying Your Line Provisioning
For bundled connections, the two B channels of your ISDN line must be able to handle data circuit
switch connections with unrestricted 64 Kbps or 56 Kbps line speeds. Two separate data calls can
be established consecutively.