Grandstream Cadence Tones

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KVSupport

4 posts

Wannabe Geek

#319261 7-Apr-2025 09:56

Hi, I'm looking for some Grandstream Cadence Tone experts. With the copper withdrawal we have a device that still needs an old copper type line. It basically dials out when a button is pushed by the user and the call centre calls them back. I have this working successfully on a Grandstream HT801 and HT802, but when the call centre hangs up we can hear what sounds like disconnect tone. The device (not the HT801) just keeps playing this tone.

Here is what i know so far after hours and i mean hours of research. There is no longer a "disconnect tone" in the cadence list. When the call from the remote end hangs up it plays the "Reorder tone"

P4003 = Reorder Tone

P4002 = Busy Tone

I think the box is looking for the NZ disconnect tone which i believe might be 4 short tones and a pause. Does anyone have this or knows how to write this?

Thanks for any help

nztim

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#3361553 7-Apr-2025 10:21

The NEAX Disconnection tone is 400hz 25ms on/off I am not sure if you can configure the HT801 to play this when the call is disconnected

Any views expressed on these forums are my own and don't necessarily reflect those of my employer.

KVSupport

4 posts

Wannabe Geek

#3361560 7-Apr-2025 10:37

Maybe thats the problem it just cant do it.

nztim

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#3361561 7-Apr-2025 10:41

KVSupport:

Maybe thats the problem it just cant do it.

You will need to find an SIP FXS device that can present this tone to your device when the call is disconnected

let me guess.... Elevator phone?

Any views expressed on these forums are my own and don't necessarily reflect those of my employer.

nicmair

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#3361602 7-Apr-2025 11:42

not sure this is helpful or not, but the Grandstream UCM's have a "learn" feature on analogue trunks and while I never had to use it, it might help identify the missing bit you need. In my case (yep a lift phone, Schindler in my case), I was unable to get any ATA to work, (Grandstream or otherwise and again I spent hours on this), but as soon as I plugged the lift phone in to the UCM Extn port, it just worked, (so of course I never needed to figure out why). These are setting on the UCM.

Hope this helps.

Cheers

Nic.

KVSupport

4 posts

Wannabe Geek

#3361618 7-Apr-2025 12:18

Its a medical Alarm, so just like a Elevator.

Is it possible for the HT801 to disconnect the call when it gets a disconnection from the SIP provider?

Thanks

nztim

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#3361643 7-Apr-2025 13:10

KVSupport:

Its a medical Alarm, so just like a Elevator.

Is it possible for the HT801 to disconnect the call when it gets a disconnection from the SIP provider?

Thanks

The HT801 detects on-hook/off-hook from the CPE, your CPE needs to detect the HT801 disconnect tone and go on-hook

Any views expressed on these forums are my own and don't necessarily reflect those of my employer.

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KVSupport

4 posts

Wannabe Geek

#3361702 7-Apr-2025 13:39

@nztim that's what we came up with to, hmm I'm wondering if it needs to hear the old disconnect tone which i think was 4 beeps and a pause, do you know the cadence for this?

PS thanks for any help its appreciated

nztim

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#3361705 7-Apr-2025 13:43

KVSupport:

@nztim that's what we came up with to, hmm I'm wondering if it needs to hear the old disconnect tone which i think was 4 beeps and a pause, do you know the cadence for this?

400hz 1ms on/off x4 Pause = no such number

Disconnect is 400hz 25ms on/off is disconnect tone

Any views expressed on these forums are my own and don't necessarily reflect those of my employer.