Loop Start Trunk Won't Release 1140E

[rpneal44]

I have an odd situation. Maybe the collective genius here can help me out. In a nutshell, intermittently, a connection between a loop start trunk and an 1140 set won't drop. Here's the scenario:

* Caller dials 615-xxx-6271 (DID number on a PRI)
* x6271 rings to an analog set port (opx 2500 for disc. supv.) 44.0.10.0
* half-tap to NICE logger (that has only analog recording capability)
* x6271 is cross-connected to a Loop Start trunk (40.0.8.4)
* Loop Start trunk PRDN is 8271
* PRDN 8271 rings 29 1140E sets - PVR 8271
* call is answered at one of them and business completed.
* User hangs up the phone and call does not drop, nor can the 1140E user re-access the line.

TNBs of the set, loop start trunk, and one of the 1140Es are below. When I trace the 2500 port, it shows LOCKOUT. Tracing the trunk or 1140E show them connected, but there is not an IP set off-hook nor on hold on that line. It appears on everyone's IP set like there's someone else on it. To break the connection, I have to DSBL the trunk port. Here's what I got when I DSBL the trunk port last night:


% SRPT4653 VGW channel TN 040-00-13-00 (2834) connected to farEnd 10.86.29.53:20 500 TN 160-% 00-04-11 (a093) was closed incorrectly, current state = RxTxOpen
%


------------------------------------------------------
DES R31M52
TN 044 0 10 00 VIRTUAL
TYPE 500
CDEN DD
CUST 0
ERL 00000
WRLS NO
DN 6271 2 MARP
CPND
NAME 401-6271 COT
XPLN 12
DISPLAY_FMT FIRST,LAST
AST NO
IAPG 0
HUNT 6272
TGAR 1
LDN NO
NCOS 4
SGRP 0
RNPG 0
XLST
SCI 0
SCPW
CLS CTD DTN FBD XFD WTA THFD FND HTA OPS
LPR XRD CWD SWD MWD RMMD SMWD LPD XHD SLKD CCSD LND TVD
CFTD SFD MRD C6D CNID CLBD AUTU
ICDD CDMD LLCN EHTD MCTD
GPUD DPUD CFXD ARHD OVDD AGTD CLTD LDTD ASCD SDND
MBXD CPFA CPTA DDGA NAMA MIND
MCRD
EXR0 LOL ABDD CFHD DNDY DNO3
CWND USMD USRD BNRD OCBD RTDD RBDD RBHD FAXD CNUD CNAD PGND FTTC
CDMR MCDD T87D PKCH MPTD
PLEV 02
AACS NO
MLWU_LANG 0
TIMP 600
BIMP 3CM2
DATE 15 MAR 2010

----------------------------------------------------------

DES 401-6271 (X8271)
TN 040 0 08 04 VIRTUAL
TYPE COT
CDEN 8D
CUST 0
XTRK XUT
TIMP 600
BIMP 3COM
TRK ANLG
NCOS 4
RTMB 31 52
PRDN 8271
CMF NO
SIGL LOP
SUPN NO
AST NO
IAPG 0
CLS UNR DTN CND ECD WTA LPR APN THFD SPCD
P10 NTC
TKID
AACR NO
DATE 2 APR 2010

---------------------------------------------
DES RM110
TN 160 0 02 04 VIRTUAL
TYPE 1140
CDEN 8D
CTYP XDLC
CUST 0
NUID
NHTN
CFG_ZONE 010
CUR_ZONE 010
ERL 0
ECL 0
FDN 6363
TGAR 1
LDN NO
NCOS 4
SGRP 0
RNPG 0
SCI 0
SSU
LNRS 16
XLST
SCPW
CLS CTD FBD WTA LPR MTD FNA HTA ADD HFA CRPD
MWA LMPN RMMD SMWD AAD IMD XHD IRA NID OLD VCE DRG1
POD DSX VMD SLKD CCSD SWD LNA CNDA
CFTD SFD MRD DDV CNID CDCA MSID DAPA BFED RCBD
ICDD CDMD LLCN MCTD CLBD AUTU
GPUD DPUD DNDD CFXD ARHD FITD CLTD ASCD
CPFA CPTA ABDD CFHD FICD NAID BUZZ AGRD MOAD AHD
DDGA NAMA
DRDD EXR0
USMD USRD ULAD RTDD RBDD RBHD PGND OCBD FLXD FTTU DNDY DNO3 MCBN
VOLA VOUD CDMR ICRD MCDD T87D KEM3 MSNV FRA PKCH RBTD
CPND_LANG ENG
RCO 0
HUNT 6363
LHK 1
LPK 2
PLEV 02
DANI NO
AST
IAPG 0
AACS NO
ITNA NO
DGRP
MLWU_LANG 0
MLNG ENG
DNDR 0
KEY 00 SCR 6217 2
CPND
NAME Barbar Frazier
XPLN 14
DISPLAY_FMT FIRST,LAST
01 SCR 56217 D MARP
CPND
NAME Barbar Frazier
XPLN 14
DISPLAY_FMT FIRST,LAST
02 PVR 8200 0 MARP
03 PVR 8270 0 MARP
04 PVR 8271 0 MARP
05 PVR 8272 0 MARP
06
07
08
09 RDL 16
10 RDL 16
11 RDL 16
12
13
14
15
16 MWK 6363
17 TRN
18 AO6
19 CFW 4
20 RGA
21 PRK
22 RNP
23
24 PRS
25
26
27
28
29
30
31
DATE 19 JUN 2009


Phil, the Phriendly Phone Man

 

[PERRYPJ]

You have built yourself one big nightmare, good luck!!!!

OLD ROLMEN WORKING ON NORTELS AND AVAYA

 

[gwebster]

Sounds like having the NICE tapped onto the analog 500 <-> analog trunk port is holding up the line and not allowing it to release.

 

[SSJVirus007]

Loop start trunks are BIG no no if use for in-coming for Nortel CS1000. There are a lot of post on analog loop start trunk in this forum.

 

[rpneal44]

I agree, guys, this is not even close to any "best practices". HOWEVER, we didn't have any issues with this arrangement until we replaced all the M3904s with 1140Es and the Opt 61 with an CS1KE (DAMN, I miss TDM!)

It is extremely intermittent, and I cannot replicate it on-demand (you all know how THAT is!) Could it be a DSP issue? And how would I nail THAT down? I'm drawing at straws, and would appreciate any suggestions or directions.

Phil, the Phriendly Phone Man

 

[rpneal44]

bump

Phil, the Phriendly Phone Man