20 second delay dialout on XUT loop start trunk

[curtismo]

Having a strange problem involving analog trunk dialout on a XUT card.

System is a MG 1000B Branch office (last install of 10 or so already in service). Trunks are loop start.

Problem is that there is 20 seconds from the time the trunk is seized until it begins outpulsing digits. We are seeing the same thing whether using a buttset to monitor the trunks or the LD 80 trace commands. All of the timers match the other MG 1000B installations. I even have problems when using an IP phone in local mode and doing maintenance commands - the trunk gets seized but the digits don't seem to be outpulsed.

We tried changing polarity but get TRK156 (trunk seizure) errors. The trunk card has also been swapped out. We are running out of ideas.

 

[MagnaRGP]

Trunks should be ground start on an M1. Some of the delay could also be due to the system checking the NRS before dialing out the analog route.

Can you post and exaple along with the RLI and RDB for the route in question?

 

[johnpoole]

just as a test dial the number dialed by a #.. if that speeds up the outpulse then you could have a couple of timers in conflict

john poole
bellsouth business
columbia,sc

 

[thattekguy]

What happens when dialing out from the Main Office site?The IP phones should be registered to the Main site and not in local mode.Thier might be an answer supervision issue since you are using loop start, but I don't think that will make the call wait 20 seconds.Are they set for DTN?Why are you using COT's to dial out is this just for local mode?

 

[curtismo]

What happens when dialing out from the Main Office site?"

Same thing, no matter if I'm in normal mode, local mode (using "Test Local Mode" on IP set) or using the MTA set commands.

I have turned on enhanced trace commands in order to see what is going on.

What is interesting that it appears during the outpulse phase I am seeing the ACOD of 7100 appearing to be dialed out. I don't see this when in the other modes.

.08:57:24 08/08/2007
ACTIVE TN 003 0 00 05

ORIG VTN 077 0 00 22 KEY 1 NUL TYPE I2004
FAR-END H.323 SIGNALLING IP: 172.xx.xxx.xx
FAR-END MEDIA ENDPOINT IP: 172.xx.xx.xxx PORT: 5200
TERM TN 003 0 00 05 COT RMBR 0 6 OUTGOING TRUNK CALL
TDTN 0 SLOT 30 PTY SLOT 62
DIAL DN 71001888nxx1234
MAIN_PM DIAL AUX_PM OUTPULSE
TALKSLOT ORIG 13 TERM 45
EES_DATA:
NONE
QUEU 128
CALL ID 0 0

TN and RLB for the outgoing trunk.

DES TRK
TN 003 0 00 05
TYPE COT
CDEN 8D
CUST 0
XTRK XUT
TIMP 600
BIMP 3COM
TRK ANLG
NCOS 0
RTMB 0 6
ATDN 2221
SIGL LOP
SUPN YES
STYP PIP
AST NO
IAPG 0
CLS UNR DTN WTA LPR APN THFD
P10 NTC
TKID
AACR NO
DATE 7 AUG 2007


TYPE RDB
CUST 00
DMOD
ROUT 0
DES LOOP
TKTP COT
NPID_TBL_NUM 0
PRIV NO
SAT NO
RCLS EXT
VTRK NO
NODE
DTRK NO
ISDN NO
PTYP ACO
AUTO YES
ICOG IAO
RANX NO
SRCH LIN
TRMB YES
STEP
ACOD 7100
CPP NO
TARG
CLEN 10
BILN NO
OABS
TIMR ICF 512
OGF 512
EOD 896
DSI 34944
NRD 10112
DDL 70
OOD 1
ODT 768
RGV 640
FLH 510
GRD 896
SFB 3
CRD 512
IENB 5
TFD 0
LEXT 100
VGD 6
SST 1 1
NEDC ETH
FEDC ORG
CPDC NO
SPCT IMM
HOLD 02 02 40
SEIZ 02 02
RGFL 02 02
RVSD 08 31
ILLR 02 02
DRNG NO
CDR NO
MUS NO
MR NO
MANO NO
EQAR NO
FRL 0 0
FRL 1 0
FRL 2 0
FRL 3 0
FRL 4 0
FRL 5 0
FRL 6 0
FRL 7 0
OHQ NO
OHQT 00
TTBL 0
ATAN NO
OHTD NO
PLEV 2
MCTS NO
ALRM NO
ART 0
SGRP 0
ARDN NO
AACR NO

 

[johnpoole]

the dial string does not look bad. did you try dialing the # after the last digit? if so did it speed up the 1st ring back? we need that information to help determine hard/software problem.. another possible test, put a but set on the analog trunk.. you should all the digits go out in a string, how long does ringback take from that test point.. nothing in the route of the trunk will slow down a call by 20 seconds, you couldn't do that via those two loads if you tried.. maybe 90 or 86.. on the main site, when you dial the same number, do you get ringback before you can finish the last digit? a pri should, if your getting any delay there, it's be magnified by the LOOP trunk, not caused by the location

john poole
bellsouth business
columbia,sc

 

[curtismo]

Actually, since we had not cut over, we moved the system to another branch and the system worked with their outside trunks.

Testing found low loop voltage when going off hook (4-5 volts). We have called the telco to look at loop current and voltage, as we are assuming that this may be causing the issue.

 

[thattekguy]

Could it be that your trunks are busy and your waiting to grab an available trunk.Does it happen all the time.Do you here a hum on the line when you are waiting 20 seconds.

 

[curtismo]

No, the trunks are not busy (verified with a buttset in monitor mode). Once NRS sends the digits to the 1000B it takes the line offhook and dialtone is returned...but then it takes 20 seconds for the digits to be outpulsed.