Force analog phone to go on-hook by tone

When using analog telephones without handset (e.g. phones with a single push button) on ATLB/ATLB-12 boards, and the conversation is ended by the intercom station, a signal must be sent from the AlphaCom to the phone to make it go on-hook.

Many single push button phones have an option to go on-hook when they receive a DTMF signal or a busy signal.

It is possible to configure the AlphaCom to send a tone after the conversation is ended.

The parameter can be set be the following event in the Event handler:

Transmit busy tone (Q1) when the call is ended

The action string is: $SNV Q1 W1 W2 W25

Q1 means Busy tone. You can change this parameter according to what tone is required. E.g. $SNV Q14 W1 W2 W25 will transmit DTMF tone 4.

Options:

• 0 = default behavior
• 1 = Busy tone
• 10-19 = DTMF tones 0-9
• 20 = DTMF tone *
• 21 = DTMF tone #

Additional information

The actual parameter in the NVRAM is:

ex_profile.glob_const.hs_tone_call_res = x

• This feature is only valid for ATLB stations, other stations using handset will get standard off-hook tone when the conversation is ended.
• Software requirement: AMC software 10.60.3.2 or newer