Juniper J-Series Administration Manual page 53

How a Services Router Initializes USB Modems
When you connect the USB modem to the USB port on the Services Router, the router
applies the modem AT commands configured in the
to the initialization commands on the modem. For more information about configuring
modem commands for the
Initialization Commands" on page 41.
If you do not configure modem AT commands for the
the router applies the following default sequence of initialization commands to the
modem:
the commands. For more information about these commands, see the documentation
for your modem.
Table 23: J-series Default Modem Initialization Commands
Modem Command
AT
S7=45
S0=0
V1
&C1
E0
Q0
&Q8
The dialer interface must be configured to use PPP encapsulation. You cannot
configure Cisco High-Level Data Link Control (HDLC) or Multilink PPP (MLPPP)
encapsulation on dialer interfaces.
The dialer interface cannot be configured as a constituent link in a multilink
bundle.
If you are using the same dialer interface for ISDN connections and USB modem
connections, the dialer interface cannot be configured simultaneously in the
following modes:
As a backup interface and a dialer filter
As a backup interface and dialer watch interface
As a dialer watch interface and a dialer filter
As a backup interface for more than one primary interface
init-command-string
AT S7=45 S0=0 V1 X4 &C1 E0 Q0 &Q8 %C0
Description
Attention. Informs the modem that a command follows.
Instructs the modem to wait 45 seconds for a telecommunications service provider
(carrier) signal before terminating the call.
Disables the auto answer feature, whereby the modem automatically answers calls.
Displays result codes as words.
Disables reset of the modem when it loses the carrier signal.
Disables the display on the local terminal of commands issued to the modem from
the local terminal.
Enables the display of result codes.
Enables Microcom Networking Protocol (MNP) error control mode.
Chapter 2: Setting Up USB Modems for Remote Management
init-command-string
command, see "Modifying USB Modem
init-command-string
. Table 23 on page 31 describes
USB Modem Overview
command
command,
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