I am new to the Aspire system, but have installed a lot of DSX systems. I have been asked to look at a system where the users are reporting a lot of line noise type issues, crackling and poor volume, disconnected calls. I'm a little puzzled though because they are using all digital stations (no VOIP) and their incoming connection is a PRI, yet the noise issues sounds like an analog problem almost.

They do have a COIU card providing four analog lines for fax devices and they have an SLIU card for the fax devices themselves. I thought about removing the two analog cards as a test, but I don't want to mess up the port numbers somehow.

Any suggestions on how to troubleshoot crackling noises during conversations on digital lines?

Aspire Main software: 7.32
Database: V10.0H