Specifications

Configuring and Managing Integrated Modems
Managing Modems
DC-94
Cisco IOS Dial Technologies Configuration Guide
Use the modem dtr-delay command to reduce the time that a DTR signal is held down after an
asynchronous line clears and before the DTR signal is raised again to accept new calls. Incoming calls
may be rejected in heavily loaded systems, even when modems are unused because the default DTR
hold-down interval may be too long. The modem dtr-delay command is designed for lines used for an
unframed asynchronous session such as Telnet. Lines used for a framed asynchronous session such as
PPP should use the pulse-time interface command.
Enabling Modem Polling
The following example enables modem status polling through the out-of-band feature, which is
associated to line 1:
Router# configure terminal
Router(config)# line 1
Router(config-line)# modem status-poll
Setting Modem Poll Intervals
The following example sets the time interval between polls to 10 seconds using the modem poll time
global configuration command:
Router# configure terminal
Router(config)# modem poll time 10
Setting Modem Poll Retry
The following example configures the server to attempt to retrieve statistics from a local modem up to
five times before discontinuing the polling effort:
Router# configure terminal
Router(config)# modem poll retry 5
Collecting Modem Statistics
Depending upon your modem type, the Cisco IOS software provides several show EXEC commands that
allow you to display or poll various modem statistics. See Table 7 and Table 8 to find the show EXEC
command appropriate for your modem type and the task you want to perform.
Logging EIA/TIA Events
To facilitate meaningful analysis of the modem log, turn the storage of specific types of EIA/TIA events
on or off. To activate or inactivate the storage of a specific type of EIA/TIA modem event for a specific
line or set of lines, use either of the following commands in line configuration mode, as needed: