[Asterisk-Users] TDM400P problems

Fri Sep 2 08:43:09 MST 2005

Probably already been covered but you do have the power connector on the
board connected right? 

-Jonathan

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Martin
Sent: Friday, September 02, 2005 12:32 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] TDM400P problems

On Friday 02 September 2005 09:33, Martin wrote:
> On Friday 02 September 2005 07:47, Alex Ongena wrote:
> > > > This is a well-known issue with the current drivers, although 
> > > > nobody's really stepped up to identify when exactly this started

> > > > happenning (as the driver code was changed) or why.

> Interesting.
>
> I have just re-installed asterisk with the digium dev kit (Xp100 and
> TDM400P) and have problems with TDM400P port #3.  I also see an issue 
> with lack of drive to the phones.  The more phones I add, the more 
> ring issues. I can 'fix'  the issue by switching phones.  The docs
>
>  ( http://www.intervoice.com/_docs/.433/601016.PDF )

I just ran some tests.

The US FCC specs are:-

Standing voltage	=	-48 VDC (minus)
Ringing voltage	=	85 - 105 VAC
current supplied	=	20 to 50mA (I haven't checked this as I
would have to 
create a break and bridge with the digital multi-meter)

My line from the central office
Standing voltage	=	-51.1 VDC (minus)
Ringing voltage	=	90.7 VAC

Port #1
Standing voltage	=	-48.4 VDC
Ringing voltage	=	42.7 VAC

Port #2
Standing voltage	=	-48.2 VDC
Ringing voltage	=	42.7 VAC

Port #4
Standing voltage	=	-44.4 VDC
Ringing voltage	=	43.5 VAC

It looks like my card/modules, are not providing the required ring
voltage.  

Anyone else checked their voltages ?

Regards...Martin _______________________________________________
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