[Asterisk-Users] x100p and groundstart signaling - help

[Gabriel]

that might be the case... this was helpful

but then I wonder what other hardware choice there is to have 2-3 analog 
trunk lines plugged into my asterisk ?

ghost at silcon.com wrote:

>Hi,
>
>Groundstart signalling is not supported on Digium (or clone) X100P and
>TDM400P FXO cards.  I recently found this out from Digium support.  I
>posted a message about this a few days ago.  Be aware that you will lose
>the anti-glare benefit of groundstart if you switch your lines to
>loopstart.  (Glare is when an incoming call and an outgoing call are
>started at the same time - The person calling you heres you dialing digits
>to make an outbound call and then you don't hear any ringing, say hello
>and are confused for a second about what just happened.) Here it is again
>-
>
>...
>
>I was surprised to be told by a Digium support person today that Digium's
>FXO interfaces (X100P, TDM400P FXO modules) don't support groundstart
>signalling.  This surprises me because as far as I know in a typical PBX
>configuration with analog trunk lines, groundstart signalling is the only
>way to prevent Glare.
>
>I just purchased two TDM400P's for a system I'm building to replace our
>office PBX (Altigen).   Since there are no statements anywhere on Digium's
>website about lack of groundstart support (Actually, to the contrary they
>boast about all the signalling support in their sales slick), I now need
>to decide if I want to return the products and switch to a T1 / channel
>bank configuration.
>
>I remember when we setup our current Altigen PBX, we had problems with
>glare and disconnect detection and so I went through the process of
>figuring out what was going on and learning about groundstart.  After we
>switched to groundstart everything worked great.
>
>In a high use system, it's highly likely that a trunk will experience
>glare, which is annoying for incoming callers and system users.   I'm just
>a bit baffled as to why Digium wouldn't support groundstart on cards
>designed to be PBX trunk lines.
>
>Someone please tell me I'm missing something.
>
>Mark
>
>
>
>
>  
>
>>yes, fxsks and fxsls are working fine. only fxsgs is giving me the error.
>>and that is how my lines are configured by the phone company. I'll
>>probably call them and try to change the lines ...
>>
>>
>>
>>    
>>
>>>  I'm not at my box right now, but if I remember
>>>correctly, I got this exact same error when I tried
>>>playing around with groundstart.  At the time, I
>>>figured I was doing something wrong, or that my line
>>>did not support gs, and the card somehow knew that.
>>>
>>>  I was able to configure for the other two types of
>>>signalling just fine.
>>>
>>>--shaun
>>>
>>>--- gabriel <lists at bayintegrated.net> wrote:
>>>      
>>>
>>>>hello,
>>>>I just installed 2 brand new x100p cards into my
>>>>linux system. Everything
>>>>compliled and worked fine from the first try.
>>>>Hoewver the phone lines I
>>>>will use with this system have groundstart
>>>>signaling. I have tried to
>>>>change the zaptel.conf and zapata.conf to use this
>>>>type of signaling but
>>>>ztcfg gives me an error every time with the new
>>>>configuration.
>>>>Bellow are the config files and the actual error.
>>>>Again, everything works
>>>>fine with the default signaling (fxsks)
>>>>
>>>>zaptel.conf
>>>>---
>>>>loadzone = us
>>>>defaultzone = us
>>>>
>>>>fxsgs=1-2
>>>>
>>>>
>>>>
>>>>zapata.conf
>>>>---
>>>>[channels]
>>>>callwaiting=yes
>>>>callwaitingcallerid=yes
>>>>threewaycalling=yes
>>>>transfer=yes
>>>>cancallforward=yes
>>>>
>>>>echocancel=yes
>>>>echocancelwhenbridged=no
>>>>
>>>>rxgain=0.0
>>>>txgain=0.0
>>>>
>>>>immediate=no
>>>>
>>>>context=default
>>>>signalling=fxs_gs
>>>>channel=1-2
>>>>
>>>>
>>>>and the error I am getting is:
>>>>--
>>>>[root at voip root]# ztcfg -vvv
>>>>
>>>>Zaptel Configuration
>>>>======================
>>>>
>>>>
>>>>Channel map:
>>>>
>>>>Channel 01: FXS Groundstart (Default) (Slaves: 01)
>>>>Channel 02: FXS Groundstart (Default) (Slaves: 02)
>>>>
>>>>2 channels configured.
>>>>
>>>>ZT_CHANCONFIG failed on channel 1: Invalid argument
>>>>(22)
>>>>Did you forget that FXS interfaces are configured
>>>>with FXO signalling
>>>>and that FXO interfaces use FXS signalling?
>>>>[root at voip root]#
>>>>---
>>>>
>>>>I don't know why I am getting this the only choice I
>>>>have is to have the
>>>>phone company change the signaling but before doing
>>>>that I was thinking
>>>>that maybe somebody used this signaling before and
>>>>can help.
>>>>
>>>>thank you,
>>>>gabriel
>>>>
>>>>
>>>>_______________________________________________
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>>>>Asterisk-Users at lists.digium.com
>>>>
>>>>        
>>>>
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>>>
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>>>      
>>>
>>>
>>>
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>
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