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Modem Control Functions
Jul 22,2008 00:00
by
admin
Modem Control Functions
The modem control category signals are sent between the DTE and
the DCE to open or close the connection. They also check the connection status.
An existing connection termination can be initiated by a DTE or a DCE.
When a termination is prompted by a DTE device, the access
server drops the DTR signal. The modem must understand that the connection needs
to end when a DTR signal is no longer present. In a DTE-initiated termination
with an improperly configured modem control, the DTR signal might not be dropped
or recognized, and the modem might not hang up as a result.
When a termination is initiated by a DCE device, the modem must
correctly reflect the state of the carrier with the CD signal. The access server
recognizes that the CD signal is low and therefore drops the connection. During
a DCE-initiated termination with an improperly configured modem control, the CD
signal might not be dropped or recognized, and you might get into someone else's
modem session by mistake.
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