×
INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Yet Another Post About Loop Start Disconnect Supervision

Yet Another Post About Loop Start Disconnect Supervision

Yet Another Post About Loop Start Disconnect Supervision

(OP)
I know, I know. Something something something get ground start trunks.

Now that we're past that. Yes, this is yet another post about loop start trunks and disconnect supervision. As you can imagine, it's not working. However, I haven't given up hope yet. I have read here that some have been successful with it behaving at least some of the time, but I have not figured out what the secret sauce for that is yet.

My lines are served directly from the CO and, yes, there is battery drop disconnect supervision. I can confirm it with 1) a butt set, 2) the line side of my toner (it has an LED to indicate power/polarity), 3) a line powered telephone that has an LED to indicate off-hook. They all show battery drop at disconnect, and it feels to be 1 second.

For the route (LD 16), I have NEDC and FEDC set to ETH. For the trunk (LD 14) I have SUPN set to NO. I've tried setting SUPN to yes and playing with the options, as well as playing with the FEDC/NEDC options (though maybe not every combination) without much success. I'm hoping one of y'all might know the trick to convincing this to at least work inconsistently. Alternatively, if you have a contact with AT&T (Pacific Bell territory) that wouldn't mind slipping into the 5ESS that provides me service really quick and provisioning my lines as ground start, that'd work too. big smile

Any suggestions would be hugely appreciated!

Printout of LD 14:

>ld 20

PT0000
REQ: prt
TYPE: cot
TN 9 2
DATE
PAGE

DES POTS 7693
TN 009 0 00 02
TYPE COT
CDEN 8D
CUST 0
XTRK XCOT
FWTM YES
BIMP 600
TRK ANLG
NCOS 0
RTMB 1 1
ATDN 7693
SIGL LOP
SUPN NO
AST NO
IAPG 0
PPID 0
BTID 0
CLS UNR DTN WTA LPR APN THFA
P10 SHL
TKID
DATE 8 JUN 2021


Printout of LD 16:

>ld 21
PT1000

REQ: prt
TYPE: rdb
CUST 0
ROUT 1

TYPE RDB
CUST 00
DMOD
ROUT 1
DES POTS 7693
TKTP COT
NPID_TBL_NUM 0
PRIV NO
SAT NO
RCLS EXT
VTRK NO
DTRK NO
ISDN NO
PTYP ACO
AUTO YES
ICOG IAO
RANX NO
SRCH LIN
TRMB YES
STEP
ACOD 81
CPP NO
TARG 31
CLEN 1
BILN NO
OABS
TIMR ICF 512
OGF 512
EOD 128
DSI 34944
NRD 10112
DDL 0
OOD 1
ODT 256
RGV 640
FLH 500
GRD 896
SFB 3
CRD 512

IENB 5
TFD 0
LEXT 100
VGD 6
SST 3 0
NEDC ETH
FEDC ETH
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 YES
EQAR NO
FRL 0 0
FRL 1 0
FRL 2 0


PAGE 002

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
AACR NO

RE: Yet Another Post About Loop Start Disconnect Supervision

Is the polarity correct going into the trunk card? NT8D14? Why is MANO set to YES

RE: Yet Another Post About Loop Start Disconnect Supervision

(OP)
I believe polarity is correct, but I will double-check to be sure.

MANO is set to yes so that when the trunk is seized via ACOD, there is no EOD delay so that things like vertical service codes (*69 and *70 as an example) can be dialed.

RE: Yet Another Post About Loop Start Disconnect Supervision

Why XCOT for trunk card type instead of EXUT? What is the part # of the trunk card

RE: Yet Another Post About Loop Start Disconnect Supervision

(OP)
The card is an NT8D14BB Rlse 7 Universal Analog Trunk card.

I could try XUT/EXUT trunk type perhaps? I haven't really messed with that setting.

RE: Yet Another Post About Loop Start Disconnect Supervision

I have never seen them built XCOT, always EXUT. Worth a shot as well as the polarity thing

RE: Yet Another Post About Loop Start Disconnect Supervision

(OP)
I am going to give this a shot in a bit and will report back! Thank you for the help, by the way!

RE: Yet Another Post About Loop Start Disconnect Supervision

(OP)
OK. I have changed XTRK to EXUT. Unfortunately, no change. Here are updated outputs of LD 14 and LD 16. I'm wondering if I have to play with SUPN settings on the trunk? Hmm...

ld 20

PT0000
REQ: prt
TYPE: cot
TN 9 2
DATE
PAGE

DES LN_7693
TN 009 0 00 02
TYPE COT
CDEN 8D
CUST 0
XTRK EXUT
FWTM YES
TIMP 600
BIMP 600
AUTO_BIMP NO
TRK ANLG
NCOS 0
RTMB 1 1
ATDN 7693
SIGL LOP
SUPN NO
AST NO
IAPG 0
CLS UNR DTN WTA LPR APN THFA
P10 NTC
TKID
DATE 9 JUN 2021

REQ: prt
TYPE: rdb
CUST 0
ROUT 1

TYPE RDB
CUST 00
DMOD
ROUT 1
DES POTS 7693
TKTP COT
NPID_TBL_NUM 0
PRIV NO
SAT NO
RCLS EXT
VTRK NO
DTRK NO
ISDN NO
PTYP ACO
AUTO YES
ICOG IAO
RANX NO
SRCH LIN
TRMB YES
STEP
ACOD 81
CPP NO
TARG 31
CLEN 1
BILN NO
OABS
TIMR ICF 512
OGF 512
EOD 128
DSI 34944
NRD 10112
DDL 0
OOD 1
ODT 256
RGV 640
FLH 500
GRD 896
SFB 3
CRD 512

IENB 5
TFD 0
LEXT 100
VGD 6
SST 3 0
NEDC ETH
FEDC ETH
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 YES
EQAR NO
FRL 0 0
FRL 1 0
FRL 2 0


PAGE 002

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
AACR NO

RE: Yet Another Post About Loop Start Disconnect Supervision

(OP)
Forgot to mention, I checked polarity and it's good. I reversed it for giggles and it won't allow any DTMF outpulsing.

RE: Yet Another Post About Loop Start Disconnect Supervision

I still think SUPN needs to be YES. What is this trunk used for?

RE: Yet Another Post About Loop Start Disconnect Supervision

(OP)
The trunk is just used for general inbound/outbound calling. If a call gets dumped to voicemail, I want to make sure it has a chance at releasing.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members! Already a Member? Login

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close