[Asterisk-Users] * point to point t1 solution?

Thu Jan 26 06:40:32 MST 2006

TDMoE would allow a T1 like connection only over the local Ethernet segment, since it is not an IP technology it can not be router across ip networks.

This would be useful to connect 2 asterisk boxes on the same Ethernet segment (or with a crossover cable).

The advantage would be lower latency than SIP or IAX - the disadvantage being a constant ~1000 packet per second Ethernet flow requires to keep the channels up.

Won't work...

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Sean Cook
> Sent: Thursday, January 26, 2006 6:36 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] * point to point t1 solution?
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> http://www.voip-info.org/wiki-Asterisk+TDMoE
> 
> Damon Estep wrote:
> > That would not be a nailed up t1 - signaling at both ends would be via
> asterisk.
> >
> > I was trying to determine if there is a way to configure asterisk to
> emulate a ptp t1 passively (no signaling) - essentially providing the same
> type of end to end circuit you would get if you ordered a point to point
> esf/b8zs t1 from the telco.
> >
> > I know how to set up asterisk to talk to the Nortel (where the Nortel
> thinks asterisk is a telco trunk) - but that is not my goal here.
> >
> > I want to replace a T1 TIE TRUNK between to Nortel's using Digium t1
> interfaces and an IP link between asterisk boxes, but still allow the
> Nortel to pass signaling directly back and forth.
> >
> > Still want to take the challenge?
> >
> >
> >
> >>-----Original Message-----
> >>From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> >>bounces at lists.digium.com] On Behalf Of Sean Cook
> >>Sent: Thursday, January 26, 2006 6:12 AM
> >>To: Asterisk Users Mailing List - Non-Commercial Discussion
> >>Subject: Re: [Asterisk-Users] * point to point t1 solution?
> >>
> >
> > Damon Estep wrote:
> >
> >>Jean-Michel,
> >
> >>I agree with all of your comments, and would be willing to bet $100 that
> >
> > NO AMOUNT OF GOOGLING will answer this question definitively.
> >
> > I would almost be willing to take that bet... find your exact
> > configuration is probably not going to happen... however finding enough
> > information to piece it together is pretty straight forward...
> >
> > http://www.tek-tips.com/viewthread.cfm?qid=1082800&page=10
> >
> > This link tells you that someone else has connected asterisk to a T1
> > interface on a Nortel NorthStar.   (first link for asterisk nortel
> > northstar).
> >
> > http://www.voip-info.org/wiki-Asterisk+Zaptel+Installation
> >
> > Whould give you a start as to how to configure the T1 card (zaptel
> > drivers).
> >
> > http://www.voip-info.org/wiki/index.php?page=Asterisk+config+zaptel.conf
> >
> > Would give you a start to configure the zaptel.conf
> >
> >
> > http://www.voip-info.org/wiki-IAX
> >
> > Gives you the skinny (no pun intended) on IAX and working with it to set
> > up the trunk...
> >
> >
> > So it would be logical to assume that if you can connect to the nortel
> > and asterisk can talk to asterisk via (iax or sip or anything else) ...
> > you only need to set up an appropriate dial plan to pass extensions back
> > and forth.
> >
> > In /etc/zaptel.conf:
> >    span=1,1,0,esf,b8zs
> >    bchan=1-23
> >    dchan=24
> >
> > In /etc/asterisk/zapata.conf:
> >    switchtype=national
> >    context=from-pbx2
> >    signalling=pri_cpe
> >    group=0
> >    channel => 1-23
> >
> >
> > [from-iax-trunk]
> > ; yeah i know this wouldn't be recommended...
> > exten => _X.,1,Dial(ZAP/g0/${EXTEN},20)
> >
> > [from-pbx2]
> > ; still not recommended...
> > exten => _X.,1,Dial(IAX/pbx2/${EXTEN},20)
> >
> >
> > This is not "Uncharted Territory" this is thinking about something as a
> > sum of its parts not as if "No one else has a solution just like me"
> >
> >
> >>After reviewing Adrian Carters very informative response regarding TDMoE
> >
> > I am getting closer to what I need to know (now my googles include
> > "asterisk" AND "TDMoE").
> >
> >>This is CLEARLY uncharted territory, while I'll bet it has been done
> >
> > before, no one took the time to document it.
> >
> > No it isn't... I know plenty of people who have connected legacy systems
> > to IP.  I am doing it with a Merlin Legend.
> >
> >
> >>My return to the list if I am successful will be to document the config
> >
> > on the wiki... fair exchange?
> >
> >>And, if along the way I find an EXPERT in this area with REAL WORLD
> >
> > PRODUCTION EXPERIENCE I will gladly pay the fees, but I am not about to
> > shell out anything to pay some know-it-all to educate themselves and
> > provide me a half baked solution that has never been put to the real
> world
> > test.
> >
> > If you are LOOKING for REAL WORLD, EXACT RepReSenTAtions  (sorry
> > couldn't resist) of exactly what you have... you are probably going to
> > be out of luck.  But consider this:
> >
> > 1.  There is plenty of ducumentation on connecting Legacy Systems to
> > Asterisk
> > 2.  There is plenty of documentation on connect two asterisk systems to
> > eachother.
> >
> >
> >
> >
> >>D
> >
> >
> >
> >
> >
> >>>Damon Estep a écrit :
> >
> >
> >
> >>>>Jean-Michel,
> >>>>
> >>>>You missed the entire point - the question is IS ASTERISK CAPABLE OF
> >
> >>>EMULATING A POINT TO POINT T1 BETWEEN 2 BOXES, AND IF SO ARE THERE ANY
> >
> > WEB
> >
> >>>BASED HINTS I MIGHT LOOK AT?  Not WILL YOU DO IT FOR ME?
> >
> >
> >>>Yes, I think Asterisk can do what you are trying to achieve. No, I
> don't
> >>>know how to do it, and no I won't do it for you since I've never been
> in
> >>>the situation you're in.
> >
> >>>As for "web based hints", with some experience I've found that google
> is
> >>>as good as asking the mailing list. If you have no success with the
> >>>mailing list, the wiki (voip-info.org) and google, you can try the irc
> >>>channel #asterisk on freenode.
> >
> >>>If that still doesn't work, shelling out a few hundred bucks for a
> >>>consultant to help you do it - and train you in the process - is the
> >>>other alternative, and is often a good deal.
> >
> >>>I've done it a couple of times myself, and it's awesome how far people
> >>>can get you and how hard they try when you recognize the value of their
> >>>work with some money (as opposed to just asking nicely).
> >
> >>>Cheers,
> >>>Jean-Michel.
> >
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