4. Operation and Maintenance
4-2
May
2003
9000-A2-GB33-20
Modem Operation
This section includes the following:
Activating the Modem PassThru Feature
Canceling Modem PassThru Operation
n
Manually Disconnecting the Modem
Verifying Modem Operation
See
Setting Up the Modem
in the
iMarc SLV Configuration Reference
for
additional information.
Activating the Modem PassThru Feature
Access to the router’s VT100-compatible user interface is provided through the
iMarc unit’s Modem PassThru feature, also known as Router Assist. A dial-up
connection to the iMarc unit is used to access the router when the unit is set up for
this use. See
Setting Up to Use the Modem PassThru Feature
in the
iMarc SLV
Configuration Reference
to configure the unit for Modem PassThru operation.
Once the unit is set up to use this feature, each time access to the router is
needed, the feature is activated from the Control menu.
Main Menu
→
Control
→
Enable Modem PassThru to COM
When this feature is active, a logical connection between the unit’s modem and
COM ports is made, and data received over the modem port is transmitted out the
COM port to the router’s AUX or console port, and data received from the router
on the COM port is transmitted out the modem port. While Modem PassThru is
active, normal access to the iMarc unit through either its modem or COM port is
suspended.
When an escape sequence (minus, minus, minus, with a minimum of 50 ms
between each) is detected, the iMarc unit switches back to normal user interface
operation.
Canceling Modem PassThru Operation
When Modem PassThru is active, but access to the iMarc unit’s menu-driven user
interface is needed, Modem PassThru can be cancelled from the Control menu.
Main Menu
→
Control
→
Disable Modem PassThru to COM
