EPN issue - phones do not ring - HELP!

[mnealtx]

Definity G3R V12, CM 2.2

EPN is a single shelf.

Test environment shows Test 117 Abort, Test 118 Fail. Error and alarm logs show Ring Gen entries for the cabinet. All stations fail test 48.

Have swapped out maintenance board, tone/clock board and power supply with no change.

Not sure what else it can be - can anyone shed more light?

- Mike

 

[joe2938]

You still could have a bad power supply or a bad cabinet as mentioned

 

[AvayaTier3]

Sounds like time for professional assistance.

A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[mnealtx]

display alarms

                                 ALARM REPORT

Port       Maintenance On   Alt      Alarm   Svc   Ack?  Date        Date
           Name        Brd? Name     Type    State 1 2   Alarmed     Resolved

04         RING-GEN    y             MAJOR         y     07/06/11:26 00/00/00:00
04A05      ANL-BD      y             MINOR         y     07/06/11:35 00/00/00:00
04A04      ANL-BD      y             MINOR         y     07/06/11:35 00/00/00:00

display errors

                     HARDWARE ERROR REPORT - ACTIVE ALARMS

Port      Mtce     Alt      Err   Aux     First       Last     Err Err Rt/ Al Ac
          Name     Name     Type  Data    Occur       Occur    Cnt Rt  Hr  St

04        RING-GEN          1           07/06/11:26 07/06/14:27 33  10  6   a  y
04A05     ANL-BD            1281        07/06/11:35 07/06/14:26 32  11  6   a  y
04A04     ANL-BD            1281        07/06/11:35 07/06/14:26 32  11  6   a  y

Errors:
04 Ring-gen Error 01

In single-carrier cabinets, the ring generator is part of the WP-91153 power supply.
Failure of the ring generator results in loss of ringing on analog phones. Ringing on digital and
hybrid phones is not affected.

Fault matches observations.
Existing WP-91153-L3 replaced with second WP-91153-L3 and then 1217A power supply with no change.

The ringing voltage is monitored by the Tone-Clock circuit pack. In a port network with
duplicated Tone-Clocks, the active Tone-Clock performs this function. In a PN made up of
single-carrier cabinets, the Tone-Clock monitors the ringing voltage of only the carrier where it
resides.

Non-duplicated tone-clock in carrier. Tone-clock replaced with no change.
_________________________________________________________________________
04A04 ANL-BD Error 1281 (ringing application test)
04A05 ANL-BD Error 1281 (ringing application test)

Error Type 1281: no ringing current is detected. Run Test #51, Ringing Application Test,
and follow the procedures for Test #51.

_________________________________________________________________________
Test board (04A04 / 04A05):
ANL-BD 51 FAIL

Test 51 - ringing application test
No ringing current is detected. The ringing application circuitry on this
circuit pack probably is not healthy.
1. Retry the command again.
2. If the test continues to fail, look for RING-GEN error in Error Log.
a. If there are RING-GEN errors, see RING-GEN (Analog Ring
Generator) on page 1972 and try to resolve any problem(s).
b. If there are no RING-GEN errors, then replace the circuit pack.
3. Retry the command again.

See Ring-gen errors above for observations and actions taken

ANL-BD 220 ABORT 1018

Neon test - no stations have neon message lamps

All port fail test 48 (station present)

The terminal equipment is not connected to the circuit pack. Some
terminal equipment, such as modems, may fail even when connected
properly.
1. Remotely test the terminal equipment.  [COLOR=#EF2929]** N/A **[/color]
2. If the test fails again, resolve any RING-GEN errors in the error log, if
present.  [COLOR=#EF2929]** Currently working this issue in this thread **[/color]
3. Check all of the wiring between the station equipment and the switch.
Then, run the test again. [COLOR=#EF2929]** Station wiring tested by line team, phones operate normally other than no ring **[/color]
4. If the test still fails, the terminal equipment may be defective. Check
and replace it, if necessary. [COLOR=#EF2929]** Swapped known working phone to jack, same issue - not equipment related **[/color]
5. Some terminal equipment might fail even when it is connected
properly. If this is the case, disable the test using change station
extension (enter n into the Test field). Note that this action also
disables Tests 6, 7, 35, and 161 on this port.

 

[mnealtx]

Joe - I've swapped in new power supplies TWICE. Power supply backplane pins are good. If you'd like to elaborate on what else could be wrong with the cabinet, I'm all ears.

AvayaTier3 - unfortunately, no higher level support. I'm it.

 

[joe2938]

sounds like the cabinet may need to be replaced if the power supplies were both ok

 

[mnealtx]

Is there any way to test the cabinet itself? Backplane and such?

If the consensus is that the cabinet is bad, I'm going to have to either install a recovered cabinet in that location or rehome the 30 affected stations to the other switch in that building.

 

[AvayaTier3]

I do not believe you have proved that your SCC cabinet is bad.

Step 1 - unplug all of your analog line cards
Step 2 - unplug all cables on the slots for your analog line cards
Step 3 - plug in a known good analog card with ports where ringing works
Step 4 - plug in a 258 or 259 adapter or 25 pair cable to cross-connect field for slot used in Step 3 and test for ringing now.


Error 	Aux 			On/Off 		 
Type 	Data 	Associated Test 	Alarm Level 	Board 	Test to Clear Value 	 

1281 (k)      Ringing Application 	  MINOR 	ON 	test board UUCSS r 2 	 
		Test (#51) 				 

1281 (k) Ringing Application Test (#51) MINOR ON test board UUCSS r 2

k. This error indicates that no ringing current is detected. Run Test #51,
Ringing Application Test, and follow the procedures for Test #51. This error
is only applicable to Analog Line circuit packs.


A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[mnealtx]

Tier3 -

Once the customer gets in I will set up a new station board with a dummy station and test for ring.

I have a spare card in the CSS that I can plug in and test for ring to use there.

I will report back with results.

- Mike

 

[mnealtx]

Cabinet fragged itself - tripped PS breaker.

Swapped PS, tripped breaker on that as well.

Put recovered cabinet in place, installed new interface, tone-clock, call classifier boards.

Installed new analog board in slot 6, created dummy station, good test call.

Will install new station boards (don't trust the ones from the failed/shorted cabinet) and will re-test.

 

[AvayaTier3]

The failing shorted cabinet most likely has issues with wiring to cables that plug into the boards. Unplug the cables and packs. Cabinets rarely go bad without someone jamming circuit packs and bending pins.

A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[mnealtx]

I'm going to pull all the cards our of the failed cabinet and inspect pins - will also try to access backplane and see if anything is shorted.

 

[joe2938]

most likely you will find bent pins on the back plane

 

[AvayaTier3]

Test cabinet with tn775, tn2182, tn570 or tn776 and one analog pack plugged in. No
25 pair cables connected to the back of the cabinet.

cables with shorted pairs connected to these slots could be what is causing the ringing
voltage to be shut down.

A great teacher, does not provide answers, but methods to teach others "How and where to find the answers"

bsh

40 years Bell, AT&T, Lucent, Avaya
Tier 3 for 30 years and counting
[URL unfurl="true"]http://bshtele.com[/url]

 

[mnealtx]

Test cabinet with tn775, tn2182, tn570 or tn776 and one analog pack plugged in. No
25 pair cables connected to the back of the cabinet.

Will have to make another fiber link to the EPN for testing. What tests would I run? Do I need to create a dummy station?

cables with shorted pairs connected to these slots could be what is causing the ringing
voltage to be shut down.

I could check that with a board test on the "new" epn, looking for fail 48, couldn't I? Would shorted pairs immediately kill the ring gen?