hutch297

I just finished resolving this very problem for a customer, (it took much time and checking because of multiple issues). Fax and modem work good for the customer now. The customer has verified that all is working fine, both modem and fax, so here are the things that I would recommend for anyone in the future:

1) Set your Medpro and ethernet ports to non-negotiate, 100MB/Full duplex. Trust me on this one or you will get intermittent problems.

2) Make sure your TN2302 is a HW20 or better. I had specific problems with a TN2302 HW3 that was supposed to work according to Avaya.

3) Ensure that you're using the latest and greatest firmware.

4) On the 2nd page of the IP-Codec form use "passthrough" instead of relay. You may try setting your packet retransmit to 1, (sends duplicate packets). This generates additional bandwidth but on a LAN it shouldn't be a problem.

5) Use G.711 rather than a compression codec

6) Normal standard practice of disabling all of the unnecessary station features on a fax or modem, such as call waiting, testing, switch-hook flash, etc, but leave data privace enabled.

7) Use a method of QoS on the network so that voice related traffic gets priority over data, (modem and fax are considered voice as compared to email traffic).

Disclaimer: If you don't have a network that is capable of providing QoS for voice or are trying to connect remote sites through a small WAN link, I can promise you that you will have problems with fax, modem, voice, anything that is time sensitive.