We've got a number of PRIs with Verizon that we're trying to switch over to NFAS. The other day, we tried to make the switchover, but after everything was changed over on both sides, the primary and backup D-channels continuously bounced up and down every half-minute or so rather than remaining up. The Verizon tech told me that he was showing a "level 3 protocol error", which to him seemed to be the holy grail of that-proves- it's-your-problem-now-I-don't-have-to-help. The NFAS settings don't give a whole lot of options, so I can't think what I'd be missing--does anyone know what settings I might be unaware of that I need to change? This is what I try setting it to: NFAS Interface Id: 0 on the first DSP, 1 on the second, and so forth... Logical Group: 0 D-channel: primary on the first, backup on the second, none on the others (which is how the telco's supposed to have it set up) NFAS type: NFAS (felt pretty confident about that one :) I also changed the switch type in the trunk settings, because although we are supposedly still plugged into a 5ESS, the Verizon tech said "with NFAS, I can ONLY do NI-2." Any ideas? ____________________________________________________________________________ I. Dwayne Koonce E-mail: dwayne@txcyber.com Chief Network Administrator Phone: (979) 268-6800 Cybercom Corporation Fax: (979) 260-2652 ____________________________________________________________________________