[Asterisk-Users] Small office requirements - Can this be done?

[Matt Riddell]

We do 4 per adsl with gsm every day.

Matt
----- Original Message ----- 
From: "WipeOut" <wipe_out at users.sourceforge.net>
To: <asterisk-users at lists.digium.com>
Sent: Tuesday, March 02, 2004 11:04 PM
Subject: Re: [Asterisk-Users] Small office requirements - Can this be done?


| Steve Kennedy wrote:
| 
| >On Mon, Mar 01, 2004 at 07:08:29PM -0600, Michael Graves wrote:
| >
| >  
| >
| >>I have disagree about the ADSL. I have a1.5 Mbit/512kbit service from
| >>Covad (in the US Southwest) and I have sustained 4 calls without a
| >>problem.  I prefer to use GSM over G.711to squeeze it down, but that is
| >>my choice. I don't feel that call quality is substandard.
| >>    
| >>
| >
| >That's the crunch (1.5/512) ... it's actually the 512 which is relevent.
| >Virtually all DSL in the UK is a wholesale product from BT (they have
| >about 2 million customers, Easynet who local loop unbundle may have
| >20,000, the rest of the providers maybe another 10,000 between them).
| >
| >All BT ADSL is 256K upstream, all BT DSL is contented (in theory 20:1
| >and 50:1, but actually a lot less than that), there are a few providers
| >doing their own contention over BT's product.
| >
| >However the 256K upstream is still the limiting factor, so you can get
| >one, and MAYBE two VoIP lines over it. If BT would up the upstream to
| >512, you could probaly get 4 out of it ....
| >
| >
| >Steve
| >
| >  
| >
| On the UK DSL using G.711 you should easily get 2 concurrect calls, 
| G.711 uses about 84k(incl overhead) in each direction, so 2 calls would 
| be 168K (of the 256k)
| 
| If you switch o GSM or iLBC you should get 6 concurrent calls, and if 
| you were to use IAX2 trunking you could *maybe* squeeze another one..
| 
| Other codecs could offer even more but I haven't tested them..
| 
| Later..
| 
| _______________________________________________
| Asterisk-Users mailing list
| Asterisk-Users at lists.digium.com
| http://lists.digium.com/mailman/listinfo/asterisk-users
| To UNSUBSCRIBE or update options visit:
|    http://lists.digium.com/mailman/listinfo/asterisk-users