atcomsystems.ca/forum Forums TDM Business Telephone Systems Mitel Telephones & Systems Echo on IP phones between nodes

The IP phones are all 5320's. Happens that one of the IP phones testing was done with was bad and always produced echo.
The actual problem is that calling on the Private Networking PRI to the Axxess produces echo. Calling across the IPRC's private networking trunks does not.
The 5000's IP phones, if they make a call to analog/digital phones on the Axxess will hear echo. The Axxess phones do not hear it.
We are looking to see if we can still get licenses for IPRC private networking or not.