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Integrator’s Reference Manual
6-22 80-99208-1 Rev. D
Hook Control (H)
Syntax
H[<value>]
Description
Controls the “Hook State” of the modem. Going “ON-Hook”
(
H, H0 or H777) while in Online-Command mode is used to
terminate an active data or test call. The “OFF-Hook” state is
not recognized by the modem, so
H1 returns an ERROR result
code.
The data call can be terminated in two ways: either in
Online-Command mode using the
H command, or in Online
mode when the DTE sets its DTR line (circuit 108/2) inactive.
The modem must be configured with
&D2 to allow the DTE to
terminate a packet data call using DTR.
Note
H777 is used to release a packet data call and have the Gateway put
the call into dormant mode. Dormant mode is not supported for
asynchronous data calls. Therefore, for an asynchronous call, H777 will
return an OK result code and release the data call, but will not attempt
to go into dormant mode.
BUSY The modem is currently on traffic and cannot
originate a call, the called party is busy, or the
IWF returned busy.
NO ANSWER Returned only if the IWF modem (for
asynchronous data calls) returns NO
ANSWER.
ERROR Invalid dial string received or a packet data call
is already active.
Result Codes Description