I am having a lot of difficulties with a specific connection I am trying to establish between two NEC systems and I know you are hugely familiar with this type of connection.
I have a new NEC SV9500SE replacing out an NEC 2400IPX and I am trying to set them up to be able to call between systems so as the users are migrated they can continue to call each other on internal extensions. I am not too worried about passing dterm displays or advanced settings although I am hoping call forwarding will work.
I have connected an MG PRI blade to the 9500SE. I have an ISDN PRI line in the 2400IPX. They are in the same room--about 15 feet apart. It seems they should talk to each other. We have all the necessary licenses in place on both systems.
The MGPRI is connected to the 9500SE in TP (Internal-PHI) mode. It would not register in SIP mode. I have confirmed the cabling is good and have been in touch with NTAC who went through all the settings (ASYD, ASYDL, ARTD, ATRK, ARTI, ADPC, ASEC, ACIC1, MBTK, AMVGIL with me and confirm the 9500SE is set up correctly. They are not willing to look too closely at the 2400IPX as service on this model has been discontinued.
They did however send me a manual for setting up the 2400 connection. Following this manual I set up the 2400IPX ISDN line, programming the Trunks, Point Code, assigning Channel Groups, making idle the trunks, etc. I am not using QSig at this point as that seems it would add more complexity.
The card in the 2400 is set up as Network by physical dip-switches. This is not assigned anywhere else (ARTD CDN 64 is 0 on all routes, etc.) and the MGPRI is set as user.
With everything set up to what I believe is correct programming, having gone through all settings many times, I have:
On the 2400IPX the connection comes up but I only get the DOPE line, LAYER never comes up. No error lights when connected to the MGPRI.
The MGPRI online light is green and the ethernet connection is up. However it shows no connection on the D light--it stays dark except for a brief flicker during boot up. In the console, I see a repeating error which I am told by NTAC means I have no d-channel communication, which confirms what the lights are showing. This error repeats multiple times over about five minutes after which the MG reboots. The error is falutrecord:sqn1,fnc4,cc0,fcl1246. The sqn number advances from 1 up to about 1000 before rebooting.
The PBXs don't show any errors except when the connection reboots they obviously show that.
I have most recently been focusing on the ARTD settings. Right now my settings match the ISDN programming manual. I have CDN 115 CMRT set to 1 on b and d routes on both PBXs.
The only other thing of note is I have found the DCH logic is set to positive in both sides. If I change either one to negative, the errors on the MGPRI stop, but I still don't get a Layer light.
On the PBXes the Dchannel routes are idle and the B channels are all in a busy state on both sides although I don't see this on the physical card in the 2400IPX.
I am hoping someone has an idea of where my settings might be off or what are I should be focusing on to get this up.
Thank you.