Modem Control Functions

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.