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Posted by Henry Cabot Henhouse III on June 16, 2005, 1:47 pm
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I have a Phone Labs pcs docking station connected to an SX2000 LS/GS port,
set for loop start. I can access the trunk, get dial tone from the docking
station, and make a call.
When the call is conected, tho, there's audio from the outside party toward
switch, but not the other way. There's just a low level noise. But, if I hit
a digit on the key pad, you can hear a slightly distorted touch tone.(I hope
I explained this correctly).
And when dialling in on the pcs phone, the docking station generates ring,
on going off hook, the inside party can hear the calling party but not the
other way.
Could it be a loop current issue? The docking station uses a small 9vdc wall
wart. And I'm using the same trunk descriptor as existing loop start trunks.
Thanks!
Dave
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Posted by on June 16, 2005, 7:13 pm
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Like Ian's response, I would say to look at the C.O trunk circuit
descriptor assignment for this trunk to make sure it is not expecting
answer supervision. The fact they your audio is 1-way and only inward
toward the switch is a classic symptom of this.
>I have a Phone Labs pcs docking station connected to an SX2000 LS/GS port,
>set for loop start. I can access the trunk, get dial tone from the docking
>station, and make a call.
>
>When the call is conected, tho, there's audio from the outside party toward
>switch, but not the other way. There's just a low level noise. But, if I hit
>a digit on the key pad, you can hear a slightly distorted touch tone.(I hope
>I explained this correctly).
>
>And when dialling in on the pcs phone, the docking station generates ring,
>on going off hook, the inside party can hear the calling party but not the
>other way.
>
>Could it be a loop current issue? The docking station uses a small 9vdc wall
>wart. And I'm using the same trunk descriptor as existing loop start trunks.
>
>Thanks!
>Dave
>
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Posted by Henry Cabot Henhouse III on June 16, 2005, 6:53 pm
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The trunk desc is set up as follows: (sorry if my cut n paste skills suck :)
I wonder if there just isnt enough loop current.
Line Start Type (Loop/Ground). . . . . . . . . . . . . . . Loop
Post Call Metering (Yes/No). . . . . . . . . . . . . . . . No
Guard Timer (100-200/800-1600/3000-8000msec) . . . . . . . 800
Calling Party Disconnect (Yes/No). . . . . . . . . . . . . No
Dictation Trunk (Yes/No) . . . . . . . . . . . . . . . . . No
Ignore Far End Disconnect (Yes/No) . . . . . . . . . . . . Yes
Disconnect Timer (100-4000 msec) . . . . . . . . . . . . . 500
Ground Condition During Busy Out (Removed/Permanent) . . . Removed
Ignore Far End Reversal During Seizure (Yes/No). . . . . . Yes
Minimum Ring Detection Timer (200-500 msec). . . . . . . . 200
Ringing Expected (Yes/No). . . . . . . . . . . . . . . . . Yes
Calling Party Disconnect (Yes/No). . . . . . . . . . . . . No
Dictation Trunk (Yes/No) . . . . . . . . . . . . . . . . . No
Ignore Far End Disconnect (Yes/No) . . . . . . . . . . . . Yes
Disconnect Timer (100-4000 msec) . . . . . . . . . . . . . 500
Ground Condition During Busy Out (Removed/Permanent) . . . Removed
Ignore Far End Reversal During Seizure (Yes/No). . . . . . Yes
Minimum Ring Detection Timer (200-500 msec). . . . . . . . 200
Ringing Expected (Yes/No). . . . . . . . . . . . . . . . . Yes
Seize Timer (10-1800 sec). . . . . . . . . . . . . . . . . 50
Address Signalling (Loop/DTMF) . . . . . . . . . . . . . . DTMF
Flash Timer (200-700 msec in 50msec increments). . . . . . 300
Fake Answer Supervision After Outpulsing (Yes/No). . . . . Yes
First Meter Pulse Is Answer (Yes/No) . . . . . . . . . . . No
Ignore Answer Supervision (Yes/No) . . . . . . . . . . . . Yes
Release Supervision Expected (Yes/No). . . . . . . . . . . No
Audio Inhibit Until Answer Supervision (Yes/No). . . . . . No
Drop Digit Rcvr for Outgoing Audio Before Ans Sup (Yes/No) Yes
Far End Connection (Local/Toll). . . . . . . . . . . . . . Local
High Loss Option (Yes/No). . . . . . . . . . . . . . . . . No
Balance Network Setting (600/Complex). . . . . . . . . . . 600
> Like Ian's response, I would say to look at the C.O trunk circuit
> descriptor assignment for this trunk to make sure it is not expecting
> answer supervision. The fact they your audio is 1-way and only inward
> toward the switch is a classic symptom of this.
>
>
>>I have a Phone Labs pcs docking station connected to an SX2000 LS/GS port,
>>set for loop start. I can access the trunk, get dial tone from the
>>docking
>>station, and make a call.
>>
>>When the call is conected, tho, there's audio from the outside party
>>toward
>>switch, but not the other way. There's just a low level noise. But, if I
>>hit
>>a digit on the key pad, you can hear a slightly distorted touch tone.(I
>>hope
>>I explained this correctly).
>>
>>And when dialling in on the pcs phone, the docking station generates ring,
>>on going off hook, the inside party can hear the calling party but not the
>>other way.
>>
>>Could it be a loop current issue? The docking station uses a small 9vdc
>>wall
>>wart. And I'm using the same trunk descriptor as existing loop start
>>trunks.
>>
>>Thanks!
>>Dave
>>
>
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Posted by Henry Cabot Henhouse III on June 16, 2005, 7:37 pm
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I just rememebred something... in the good old days, circa 1985, well, good
for the 1A2 guys hehe but horrible for music, I had a pair of dry loops
between two buildings. I was using a small switch at each end, station to
trunk to interconnect the switches.
The station side battery was 24vdc, but the trunks required 48vdc or they'd
busy out.
I used some sort of cheapie "repeater" that handled a wide voltage range on
the co side and put out a constant 48v on the cpe side. It worked fine, and
also passed ring.
It's been sooooo long, and after hundreds and hundreds of kegs and casks of
beer and wine, the old memory is a fading... anyone remember the technical
term for what I'm describing?
Thanks oodles!
Dave
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Posted by Ian on June 16, 2005, 11:24 pm
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> I have a Phone Labs pcs docking station connected to an SX2000 LS/GS port,
> set for loop start. I can access the trunk, get dial tone from the
docking
> station, and make a call.
>
> When the call is conected, tho, there's audio from the outside party
toward
> switch, but not the other way. There's just a low level noise. But, if I
hit
> a digit on the key pad, you can hear a slightly distorted touch tone.(I
hope
> I explained this correctly).
>
> And when dialling in on the pcs phone, the docking station generates ring,
> on going off hook, the inside party can hear the calling party but not the
> other way.
>
> Could it be a loop current issue? The docking station uses a small 9vdc
wall
> wart. And I'm using the same trunk descriptor as existing loop start
trunks.
>
> Thanks!
> Dave
>
Hi
Sounds like an answer supervision issue possbly, what do you get if you
connect an extension port to the ls/gs trunk ? I would try that first.
Ian
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