Incoming calls take a long time to reach the auto attendant

[Don_Zalmrol]

As the title says, again we are experiencing problems with our 3CX Phone System.

Outgoing calls no problems…
Incoming calls take a very long time to receive the auto attendant message & DTMF options.

When I look at the incoming calls, they are guided properly towards the auto attendant. Yet it takes a very long time before the prompt starts to play…

The firewall is properly configured and following ports are opened for 3CX:

5060, 5061, 5090, 9000-9063, 10000

Here is the log of my 3CX server:

Then it gets weirder, the auto attendant for our business is having that problem and the other one for our private home lines is being dropped…

I'm starting to think there is a problem with our network card, yet this card is replaced by a new one…
I'm thinking this, because we had a similar problem, but the callers never received any of the auto attendants on any line at all…

Thank you for your help in advance!

Cheers,

Laurens

 

[Don_Zalmrol]

Re: Incoming calls take a long time to reach the auto attend

I've tested my system with our simbox, and there the problem doesn't exists…

The problem is between our server and voip provider (weepee).

Our network is as follows:

WAN (Telenet) -> Router (DSR-1000N) -> Switch (DGS-1500-28) -> Server (HP Pro Liant 350)
81.82.x.x 10.0.0.1 10.0.0.3 10.0.0.2

 

[leejor]

Re: Incoming calls take a long time to reach the auto attend

15:53:00.250 [CM503021]: Call(142): ACK is not received

It would appear that some SIP messages are not able to get through your Router/Firewall/Network.

 

[Don_Zalmrol]

Re: Incoming calls take a long time to reach the auto attend

Apparently SIP calls from the WAN side to the LAN side fails or "hangs" in de auto attendant "queue" when you enable traffic management on your router…

Problem solved