Specifications

4-7
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 4 Verifying Modem Performance
Background on Asynchronous Data Communications
Table 4-2 describes some of the significant fields shown in the previous example:
Table 4-2 Show TTY Line Field Descriptions
Field Description
Capabilities
Describes different aspects of the line:

The
flowcontrol hardware
command displays as “Hardware
Flowcontrol In, Hardware Flowcontrol Out.”

The
modem inout
command displays as “modem callout.”

The text “Line usable as async interface” means that there is an
“interface async N” that corresponds to “line N.”

The text “Modem RI is CD” displays for historical reasons.
Modem state
Displays the current status of the modem.
Possible values include:

Idle
—Modem is ready for incoming and outgoing calls.

Conn
—Modem is connected to a remote host.

Busy
—Modem is out of service and not available for calls.

D/L
—Modem is downloading firmware.

Bad
—Modem is in an inoperable state, which is manually configured
by the
modem bad
command.

Bad*
—During initial power-up testing, the
modem startup-test
command automatically put the modem in an inoperable state.

Reset
—Modem is in reset mode.

Bad FW
—The downloaded modem firmware is not usable.
Modem Hardware
state
Displays the RS-232 signal state status.
CTS and noDSR are incoming signals. DTR and RTS are outgoing signals.
NoDSR means that no call is currently connected.