NEAX 2400 IMS power mod prob, can't call exts.

[3000gt]

There's a 2400 IMS system in a building that lost all connectivity station to station, all boards showed red LEDs. Don't know how it went bad, the owner says no power failure, but maybe the battery is junk and a brownout was enough to cause it to have a power alarm, or even lose programming with no battery to hold office data.

We checked it out and the power module PA-PW-21 was indicating a CPU LED. We switched the PA-PW-21 with a working PW-03 and and all alarm LEDs went out.

However, even after several reboots, and even though all board LEDs except the trunk board's are green, can't dial any system extension number. We're either getting a busy tone immediately.

Trying to hook up MAT command laptop now to the RS connector on the system to log in. Anyone know if the NEC cable needs the MOC connection connected as described in the manual? We have the original NEC cables that came with the system, it's from 1984, they wouldn't connect right. And some cables from a 2400 IMX, only a few years old.

Also, anyone know how to check the battery that keeps the ROM/RAM office data storage intact?

 

[3000gt]

So, using a cable from another working 2400 IMS with SIM 5200 circa 12 yrs. old system, which worked on that system, we hooked it up to the bad 2400 IMS.
The system still says no connection. It appears the switch is not sending any data to the laptop running the CMD software. It may not be booted properly, even though all the LEDs are green, including the CP09 and MEM boards.

We checked the batteries out on the MEM boards and they appear to be ok as they are showing 4 mv on the voltmeter.

Is there any way to tell if this thing has booted properly and contains office data?

Expertise in Avaya, Rolm/Siemens, Mitel, Nortel, NEC, Alcatel, Toshiba, Aspect, Ericsson, Executone, Panasonic PBXs & KSUs

 

[OMBD]

If you still cannot communicate with the CPU you may have a bad IO card. Do you have a spare IO card? If it is an old SIM you can program from ext. 2041.

Jerry Pannell

http://www.SCLB.com

techs@sclb.com

 

[3000gt]

Thanks for the advice SCLB. Have not tried another IO card yet but we did try this:
We purchased a new set of TTY CA cables, a new SW05 (TDSW), CP09, and ME18 cards. We reset the system, cleared the ME18 data, and tried to start to program the switch with new office data.

However, we don't get any response from the switch at all when the MAT commands is running on a laptop. The program runs fine, but we have not been able to log into the system since it had the original power failure.

Doesn't this point to a problem with the log in, maybe bad wiring in the TTy cables, or in the 25 to 9 pin adapter cable we're using to connect the TTY to the laptop?

Is there anywhere to check the wiring through all these cables? The system has a CP09 (N2400 4002 1/2 J1.3) cpu card, and the RS connector is on the MISCU board, part number (BA-M00).

We'l also try another I/O card.


Expertise in Avaya, Rolm/Siemens, Mitel, Nortel, NEC, Alcatel, Toshiba, Aspect, Ericsson, Executone, Panasonic PBXs & KSUs

 

[3000gt]

We've replaced the CPU, MEM, SW05 (TDSW), and PA-I002 cards, we still cannot log into this IMS. Need to get the correct pinout diagram for the TTY cables and how the pinouts matchfrom the RS connector to the 9 pin com 1 port on a laptop.

Expertise in Avaya, Rolm/Siemens, Mitel, Nortel, NEC, Alcatel, Toshiba, Aspect, Ericsson, Executone, Panasonic PBXs & KSUs

 

[farmerfred]

Hi, Just found out about tek-tips....cool!! I hope you got your 2400 up and going.....But if not here goes, I'm a house mouse for a utillity, phones are only 2 to 5 percent of my job, worked with 2400 for 15+ years, we now have 2 IPX and a 2000 IPS that I must take care of. as far as 4mv on the memory card batts...no should be much higher like 3 to 3.8 volts to hold the ram memory (as I recall its a 3 cell lithium pack) ..."all boards showing red LEDs" just the led at the top of the card... or all station and trunk leds?? if its just the ope leds that are red, as I recall you lost clock?? if it's the station and trunk leds (and they are flashing) the ports aren't programmed... can't connect w/pc to IO card??? probably all office data is gone and it doesn't know what to do with the IO card.... Remember with no office data it's not a phone switch, it's a space heater!!! As I recall back in our early IMG 4200 software days, the mat hooked to the AL- 0? alarm card (4 or 9) perhaps... I think I still have the books from that switch for mat hook up etc. and I know I drew out the mat cable because ours was a custom built from the Amphonal to the PC due to length requirements (25 feet for RS-232 Ha! that's just to keep the grounds the same and noise at a minimum!) I remember there is/was no hardware handshaking going on, just three wire hook-up pins 7(sig gnd) 2 (tx data) and 3 (rx data) on the DB 25 end and it was at the right side (upper pair count) of the 3M 310(?) block we had on the MDF.. I'll look for the books and my old notes Monday, but I'm sure you must have resolved your problem by now... I mean if any of our stuff quits working, if it's not fixed and back up in a 1/2 hour or so it's a MAJOR deal!!