Neil D. McAliece wrote: >I've read (& I guess it makes sense) that the low bandwidth codecs are worse >when there is any packet loss. Each packet lost is going to represent a higher >percentage of audio that is screwed up compared to a higher bandwidth codec. > >I can't remember the last time I saw any packet loss on our ADSL connections. > >We are using g729 for everything including ATAs and IP deskphones and PABXs. >Quality seems fine. > >We have 3 sites linked by VPN with ADSL connections dedicated to VoIP (with >Internode). 2 of those sites have Asterisk PABXs with a IAX trunk running >between them. The main Asterisk box has an IAX trunk out to a provider (Nehos, >was called I-fone until recently). Last time I spoke to Norman at Nehos, they >were also using Internode for bandwidth which couldn't hurt. They are chasing >the business market and seem to be very serious about call quality problems. >Their call provision is built around Asterisk, so they are very knowledgeable >re Asterisk issues. > >We are using the commercial g729 licences on the Asterisk machines. > >IAX is much more efficient than SIP when trunking is enabled. Somewhere around >40 simultaneous calls with g729 on 512/512 kbit link. > >Quality seems fine so far. No one noticed much difference when I switched to >ulaw/alaw higher bandwidth codec. There are so many variables with VoIP >though. The cheap deskphones don't sound as good as our single SNOM 360 no >matter what codec I use. > >We've got some sipura SPA-841s and a Budgetone 102 which sound average >(completely useless when you use the speaker phone on them). > >Until we can go with decent IP deskphones I'll finish off adapting our old >legacy PABXs (which mostly have decent speaker phones attached to them already) > > Thanks Neil, that's great.
Did you build your own asterisk box or did ifone supply? David -- For secure communication with the GMC see http://gmc.net.au gpg key Secure Mail (Current 10 February 2005) <[EMAIL PROTECTED]> 0x9CAE0C53 at keyserver.medicine.net.au _______________________________________________ Gpcg_talk mailing list [email protected] http://ozdocit.org/cgi-bin/mailman/listinfo/gpcg_talk
