All - I am posting on behalf of a coworker. He is setting up Skype for Business with Mitel and having issues. He brought Microsoft into it to work with the PBX vendor. MS is saying that some ports are being blocked by the PBX. When he sent the request to the vendor, their answer is that the PBX doesn't drop/block any ports. Below is the exchange.... Can anyone clear this up for him?
Microsoft's email that was fwded to the vendor along with my coworkers email:
.....just know if you had a range of let’s say 5070 – 5090, then you are telling your telecom person that you can send TCP/SIP and Media through that particular range; but on this particular trunk you are going to send SIP and Media through a particular port that you specified on the “Listening port for IP/PSTN gateway” section of the trunk configuration.
The Mediation server can handle multiple connections over the SIP trunk that are created to the IP/PSTN gateway. In this example, we are saying that the PBX is listening on port TCP/5068 and the Mediation server is listening on port TCP/5068. Besides these ports the Mediation server uses ports 60,000 – 65,536 (UDP) for the audio traffic as well. Make sure to open firewall ports 60,000 – 65,536 between the Mediation server and the PBX.
Coworker: I’ve been working with Microsoft support. When we did a pcap from the mediation server we got the following results. We need to have ports 50000 to 65535 tcp and udp opened on the pbx to allow media traffic.
PBX Response:
No ports are blocked on the PBX. We are not using the mediation server,.
Any help is appreciated!