AudioCodes 1248/124 working with Emergency Blue Lights and All Campus Alert

[gs283260]

We have ATAs by AudioCodes. We have both 1248 and 124 units. We are having issues with DTMF working with the Emergency Blue Lights and our All Campus Alert System. We can connect with each of the units but once connected they do not seem to pass DTMF correctly. Any help would be great. 

[Eliot]

hi gs283260,

according to the zoom certified audiocodes ata as of 8/23/2023, I do not see 1248 or 124 as being certified by zoom.  Note that mp-124e is certified.

AudioCodes

Notes:

• For setup instructions, see the provisioning guide for AudioCodes MP series gateways.
• Some models with certain revision numbers are not supported. Refer to the AudioCodes website for more information.
• For assisting provisioning on the MP504/508 (formally M500Li) Analog Gateway, follow these instructions.
• When you enabled SRTP for these models, there is a reduction in the available channels. Only the following channels have SRTP enabled and are available for use:
  
  
• MP-124 - 17 channels from 24
• MP-118 - 6 channels from 8
• MP-114 - 3 channels from 4
• MP-1288:
• For the new hardware component, please downgrade the firmware to version 7.40A.250.851. The upcoming new firmware 7.40.500 version, due end of May 2023, will support the new hardware component blade. You can review the AudioCodes product notice #0491 component replacement for detailed information about new hardware revision.
• For existing hardware, continue to use the current published firmware version. 
• (MP-1288, MP-112, and MP504/508 (formally M500Li) don't have a reduction in available channels)

https://support.zoom.us/hc/en-us/articles/360001299063-Zoom-Phone-Certified-Hardware#

please also see:

Setting Up AudioCodes MediaPack ATAs for Zoom

Did my response answer your question? If so, please don't forget to mark the reply as an accepted solution.

thanks,  eliot

[gs283260]

Eliot, thanks for this,  but we already have this and these units are already working with Zoom. We are having issues with the Blue Lights not working with the units with the DTMF.

[newl]

Hello @gs283260 ,

Very familiar with the MANY issues surrounding DTMF while using Zoom and AudioCodes ATA's.

Have several MP-1288s deployed in multiple datacenters across a large university campus, support an on-site PSAP along with hundreds of Blue-Light Phones, Intrusion Alarms, Fire Alarms, Access/Gate Panels etc.

Have clearly shown over 100's of hours of testing between Zoom and AudioCodes (Engineering and R&D) over MANY months; DTMF is basically non-operational when trying to pass it through Zoom. Apparently this issue stems from how Zoom has chosen to implement things like RFC2833, G.711 and OPUS 

This is a known issue that is not getting enough attention!! *cough* Zoom Phone Engineering *cough*

The only fix that we have found is to completely bypass Zoom for any equipment that needs to send DTMF. We have had to implement intra-ATA routing between our MP-1288s. This adds further headaches in administration not to mention we have hundreds of CAP licences that are useless.

On-prem analog infrastructure is a key component to a large organization moving to a new phone system; and it is critically important as it supports services like 911 and Fire Alarms.

What is truly disheartening is that Zoom seems to consider on-prem analog infrastructure a small and insignificant portion of their Zoom Phone product to apply the needed engineering cycles to actually fix this problem. I won't even start to get into the hot mess that is managing a AudioCodes MP-1288 and Zoom.

I know many folks who work at Zoom and honestly think Zoom is a great partner despite this issue. Zoom Phone is an excellent VoIP solution that really elevates Zoom to a World-class UCaaS platform; but the fact that large on-prem analog issues can't be addressed, leaves me scratching my head.

If you or anyone else on this forum ever wants more details about what we have had to do to get DTMF functioning, Send me a DM and I would be happy to meet or take a call.

Hope this is helpful

[Rick725625]

We just switched to Grandstream but seem to be having the same problems we did with AudioCodes. 
Are there particular Grandstream settings that need to be adjusted?

[cdmiller]

Hi All

Was this issue ever resolved?  We have identical problems with our blue light phones (Ramtel) using Zoom via Audiocodes.

[newl]

Hello @cdmiller ,

We are decommissioning all of our AudioCodes MP1288s in favor of the Grandstream GXW4248V2.

By moving to Grandstream we have solved all issues related to DTMF as well as hardware problems that seem endemic to the MP1288s.

Hope this helps

[tom_d]

We are in the middle of a migration to the MP1288s and Zoom and are seeing issues with alarm lines. What features on the Grandstream make it work, something Audiocodes can't do? Thanks in advance.

[Succ]

I will like to know more 

[cdmiller]

Thanks so much for the information.  I'll look into it.

[Rick725625]

We've had the same issues with our Blue Light phones. Were able to get them working on our 1288s by changing the input gain to -6 db. However, the MP124s are still having issues.

[dstokes805]

I have been able to get our Blue Light phones to work on our campus, with MP-1288's. It took a little bit of work, but now the configuration seems to be fine for all of our devices. 

[ChrisDavis]

Congratulations! Would you mind what configuration settings you had to use? 

[bjp_2017]

@dstokes805 having a similar issue wit hour blue lights, how ever its only with the single button push models. Would you mind giving some info on what you found for your solution? Ive been all through the dtmf /analog settings etc.. cant get it to dial. 

Thanks!  

[dstokes805]

We had to change a few settings. We are using the Gai-Tronics 397-001 model phones and MP1288. Out of the box I followed the Zoom/Audiocodes fax setup guide. The following are settings changed outside of that to make the bluelight phones work on our campus. 

• Signaling & Media > Media > Voice Settings > DTMF Transport Type = Transparent DTMF
• Signaling & Media > Gateway > DTMF & Supplementary > DTMF & Dialing > 1st Tx DTMF Option = Not Supported

If you have further questions, I'm happy to hop on a call

[Eliot]

hi @tom_d 

You might consider contacting Zoom Community members who were successful in getting AudioCodes MP-1288 to work with Blue Lights.

 @dstokes805 

‎2025-02-04 04:30 PM

I have been able to get our Blue Light phones to work on our campus, with MP-1288's. It took a little bit of work, but now the configuration seems to be fine for all of our devices.

 @Rick725625 

‎2024-09-18 09:58 AM

We've had the same issues with our Blue Light phones. Were able to get them working on our 1288s by changing the input gain to -6 db. However, the MP124s are still having issues.

Please also review attached AudioCodes 4/2/2025 version of Setting Up AudioCodes  MediaPack™ Series ATAs in  Zoom Phone Environment.  Check to see that you have specified firmware version.

You might consider opening tickets with Audio Codes and Zoom or replacing Audo Codes MP-1288 with Grandstream GXW4248V2.

Did my response answer your question? If so, please don't forget to mark the reply as an accepted solution.

thanks, eliot

[cdmiller]

Thanks, everyone, for your responses.  We moved our blue light phones to a Grandstream gxw4248v2, and they work perfectly now.  The phones had a little trouble hanging up, so we increased the Loop Current Disconnect Duration from 200 to 500, which resolved that issue.

[bjp_2017]

Has there been any updates for the MP124? We are having a similar issue, we are using Gai-Tronics phones, the one model we have is a 294AL-001. Whats odd is the call button and key pad work with no issues. However when we press the Emergency button, the phone produces a broken dial-tone for about 30 secs then disconnects. There is no ring-down programmed. Banging my head around every dtmf setting etc.. 

[Eliot]

hi @bjp_2017 

please review the attached gai-tronics manual p. 19 ring-down operations for emergency button.  has this configuration been completed?

audio codes manual and release notes also attached.

Did my response answer your question? If so, please don't forget to mark the reply as an accepted solution.

thanks,  eliot

[bjp_2017]

@Eliot thanks for the reply, yes we have configured the ring down, we actually wiped it out, and then configured it again. Whats interesting, is with no extensions configured, we get straight dial-tone when pressing EM button, once ring-down is configured we immediately get a broken dial-tone for about 30 secs then goes to reorder until we physically disconnect the phone. 

I have the audiocode user manual for the mp124, I am still mulling through that with the settings Its perplexing what is happening.