[Asterisk-Users] Beyond T1

[Matthew Boehm]

So was there an answer to this?

We have at least 10 T1 lines into our Cisco router and from the router, 1
Fast Ethernet going into the * server.
If we slap another nic card into the * server, will/can * do any kind of
load balancing between the two interfaces?

We are not using any Zap cards as all our calls go thru the Cisco router as
SIP.

Thanks,
Matthew

----- Original Message ----- 
From: "Glenn Dalgliesh" <asterisk at techhat.com>
To: "Asterisk Users Mailing List - Non-Commercial Discussion"
<asterisk-users at lists.digium.com>
Sent: Thursday, September 16, 2004 12:35 PM
Subject: Re: [Asterisk-Users] Beyond T1


> Well, you might be better off at that scale to use a cisco as5850 or equiv
> with SER and Asterisk. I might not work so well with 672 calls going thru
1
> asterisk box.
>
> ds3 <-> Cisco as5850 <-> Asterisk (Possible multiple depending on actual
> config and use)
>
>
> ----- Original Message ----- 
> From: "Marcelo Pacheco" <marcelo at macp.eti.br>
> To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> <asterisk-users at lists.digium.com>
> Sent: Thursday, September 16, 2004 12:52 PM
> Subject: Re: [Asterisk-Users] Beyond T1
>
>
> > I'm no E1 expert, but as I understand one channel is wasted with
framing,
> so
> > it is as 2048000 bps link, where one 64000 bps channel is wasted with
> > signalling. So there's 31 channels left. If you use E&M, FXS or FXO, you
> > could get 31 voice channels, with PRI or MFC/R2D you get 30 voice
> channels.
> >
> > I now that from the fact that a full E1 with EuroISDN gives you 30 voice
> > channels.
> >
> > An a full E1 with Brazilian R2D also gives you 30 voice channels, as one
> > channel is used for signalling as CAS (Channel Associated Channeling),
> where
> > each 4 bits is used for each channel.
> >
> > The only situation where you get closer to actual 2mbps out of an E1
> channel
> > is when you run SyncPPP, Frame Relay or another bit synchronous protocol
> on
> > the full trunk/link, where you throw away the channelling and use the
> whole
> > link as one big synchronous bit pipe.
> >
> > Marcelo Pacheco
> >
> > Em Qui 16 Set 2004 13:26, Andrew Kohlsmith escreveu:
> > > On Thursday 16 September 2004 12:17, Andrew Thompson wrote:
> > > > Depending on where you using the circuits, you might try an E1. It
> uses
> > > > the same total bandwidth as a T1(I think), but splits the channels
at
> > > > 56K instead of 64K, yielding more channels. (And now I can't
remember
> > > > the number.)
> > >
> > > uh, no.  This is definitely NOT correct.
> > >
> > > T1 is 24 8-bit channels + 1 framing bit sent 8000 times a second.
> 24*8+1 =
> > > 193 bits per frame * 8000 = 1554000bps.
> > >
> > > E1 is 32 8-bit channels + 1 framing bit sent 8000 times a second.
> 32*8+1 =
> > > 2056000bps.
> > >
> > > (my E1 knowlege is poor, I hope I am not furthering the misinformation
> > > here)
> > >
> > > In both cases you get 64kbit clean channels unless you're doing
> robbed-bit
> > > (inband) signalling.
> > >
> > > -A.
> > _______________________________________________
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