3CX on RDS voice quality (static, dropouts, robot voice)

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Lucian Burns

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First time caller. We have rolled out two Azure RDS hosts for our COVID inspired work from home remote access solution, staff are at home using a mix of devices, work owned and otherwise. Inside the same Azure tenancy is our 3CX server. We have are experiencing various degrees of very poor voice call quality. Here are our observations, in all instances this is the 3CX Windows application installed:

1. 3CX from within RDS session, calling mobile phone network - quality is fine
2. 3CX from within RDS session, internal call, call answered on 3CX from within another RDS session - quality is awful (like really bad)
3. 3CX from local computer, calling mobile phone network - quality is fine
4. 3CX from local computer, internal call, call answered on 3CX from another local computer - awful again

No combination of port, codec, tunnel or non-tunnel, other configurations on the 3CX client application, seem to make any difference.

Sype, Slack, Teans, etc. all run beautifully for any of these locations (in fact better than 3CX quality has ever been).

Further info, our preference is to use 3CX inside the RDS session as otherwise agents cant see call queues, in some cases calls dont pop over the top of the RDS session, etc. I know some are using 3CX on the local computer Ok, would be very curious to know how that was made successul in a call centre environment.

I guess I have two questions.

Q1. Does anyone have any pointers to where I should go to troubleshoot further?
Q2. Does anyone know of alternate call software I can integrate with 3CX to handle the 'last mile' communications.

Regarding Q2 I am thinking that if I could leave 3CX doing the queue and agent work, but divert all the phones at the server side to some non-3CX agent for the voice work then perhaps I can side-step around this issue until we can get it fixed e.g. stupid example (cause almost certainly not possible), 3CX extension diverted to Skype, you know something like that but replace Skype with XXX (?)

Any other advice greatly appreciated, this is killing us at the moment and we cannot properly service our customers. Many thanks in advance.
 
This post is more for benefit of those who may follow later, the solution described above is working well for us. There are a couple of caveat but otherwise good. I am happy to hear from you PM me if you want to discuss.

Also, we have some difficulty with attended transfers, not sure exactly as I havent been close to the conversations but I think the issue is getting back to the original caller if the 3rd party doesnt answer. These are the instructions our support desk created:

When using the Att. Transfer, if you wish to return to the caller:

1. Press “CTRL, ALT & Break” simultaneously to return to 3CX Client on local

2. Click on 3CX icon in task bar (if window is not displayed)

3. On the 3CX Client window, click on the line the caller is on (usually Line 1) and they will now be able to hear you

4. Pres “CTRL, ALT & Break” simultaneously to return to your MIPS HOST session
 
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