[asterisk-users] Leased line interconnect

[Eric Bishop]

So would both work with Asterisk as an interconnect? The configuration I
want is:


Asterisk/TE410 (Site A) <---> 30 channels in the service provider network
<---> Asterisk/TE410 (Site B)

With the 31x64kbps leased line the service provider gives the following
specifications:
Max bandwidth: 1984kbps
Framing: G.704
Line encoding: HDB3
Customer interface: Electrical G.703

With the E-1 the service provider gives the following specifications:
Max bandwidth: 2048kbps
Framing: Clear Channel
Line encoding: HDB3
Customer interface: Electrical G.703

The question is will either one work with Asterisk? And what are pros and
cons of each service for use in conjunction with each. Could I run a PRI
protocol over either one since I will cintrol both ends?




On 9/23/06, Jay R. Ashworth <jra at baylink.com> wrote:
>
> On Sat, Sep 23, 2006 at 08:22:18AM +1000, Eric Bishop wrote:
> >    We are looking to interconnect 2 Asterisk boxes at seperate sites via
> a TDM
> >    leased line, rather than IP mainly for commercial reasons. Our
> network
> >    provider is offering us either a 31x64kbps leased line or an E1. Am I
> just
> >    ignorant or are these the same thing? An E1 has 30 B channels and 1 D
> >    channel. That is also I guess what we would run over the 31x64kbps
> leased
> >    line so what is the difference? Which should I choose and would work
> best
> >    with Asterisk.
>
> My intuition is you're gonna spend a whole lot of extra money on
> interface cards doing it that way.
>
> An E-1 is a 32-timeslot circuit; usually broken up as 30B+1D+sync.
>
> If you get it as unframed data, rather than a PRI, you can have all 31
> slots to yourself, since you don't need one to talk to the switch.
>
> You might want, if you can, to expand on your "commercial reasons".  If
> you're getting a leased line, you can *still* put the appropriate
> half-bridges on each end, and run IP over Ethernet over that line...
> which would probably be cheaper than the T-cards.
>
> Plus, I'm told that it's a Bad Idea to have multiple T-cards in one
> chassis... though I can't imagine why...
>
> Cheers,
> -- jra
> --
> Jay R. Ashworth
> jra at baylink.com
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> 1274
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