[Asterisk-Users] Re: Tormenta ISA E1 card

it info at itwav.com
Wed Mar 19 12:14:24 MST 2003


Hi,Steve,
   I think VCXO and the crystal are the different things.


----- Original Message ----- 
From: "Steve Underwood" <steveu at coppice.org>
To: <asterisk-users at lists.digium.com>
Sent: Wednesday, March 05, 2003 4:41 AM
Subject: Re: [Asterisk-Users] Re: Tormenta ISA E1 card


> Hi John,
> 
> That is correct. Note those are VCXO crystals, and not ordinary ones.
> They need to have the right pullable characteristics to get reliable
> results. If you downlod the info from Dallas for the framer chip they
> give some recommendations for off the shelf crystals which will work.
> 
> Regards,
> Steve
> 
> info at itwav.com wrote:
> 
> > Hi!Steve,
> > Thank you for your reply. I think the change for Tor ISA card from T1
> > to E1 might be as following:
> > T1 E1
> > VCXO crystals 6.1756MHz 8.192MHz
> > framer chips DS2151 DS2153
> >
> > and the jumper E1-1 and E1-2 should be closed.
> > I don't know if what my suspection is right. So,I need your confirm.
> > Think you.
> >
> > john
> 
> 
> 
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