Our first attempt at installing BRI circuits on the Neax 2400 was not smooth. Admittedly, we were not experts in this application although we had some experience with BRI on the Neax 2000 (with limited success).

Initially the PA-8ILC card was installed and programmed in accordance with information obtained in the manuals. We first suspected something was wrong when users could not dial intermittently (every other call was going through). NEC tech support advised to replace PA-8ILC card. Even after doing so, the problem reoccurred later. At this time, a software upgrade was done as recommended by NEC. We upgraded from 6100 software version E to 6100 software version F7.02. This same problem has occurred once since then.

We are keeping an eye on it.

It was discovered later that ETI-156 was required to make the BRI circuits work properly. We used Volume 5, Issue 3, September 1997. Chapter 7 of the installation notes was the most helpful part; although on the Courier modems that we used no Spid numbers were entered. We used the ATT protocol instead of the Northern Telecom, as it did not require Spids.

As the modems that were used (Courier I), were incapable of establishing 128k incoming connection speeds, a ring/no answer problem came up. When the first b-channel was in use, calls made to the same number would automatically hunt to the second b-channel where they would be ignored by the modem. To resolve this we simply had to busy out the second b-channel on the Neax 2400. This is a modem limitation and not a Neax 2400 problem.

The customer also had the need to be able to dial in at analog x2 (56k) speeds. Initially the connection speed was limited to around 33.6k until all pads were removed from the PRI circuit.

After removing the pad the customer was able to achieve speeds approaching 56k. The APAD command was used to reinsert padding on the line for general telephone users as line levels were generally too loud.

Note: Received 3/98 from BMS Communications.