Leif, You will experience packet loss for sure using any wireless service.
But if this is your only solution available to you, I would recommend the following setup: Use an Asterisk server with a Sangoma Transcoding card to handle iLBC codec (Digium transcoding cards do not support iLBC). The iLBC codec is a very low bandwidth and handles packet loss very well. I tested this setup and I was amazed about the voice quality using iLBC. I couldn't tell the difference. Polycom Phones are compatible with iLBC codec. Good luck. Stephan Monette Unlimitel Inc. Tel.: 1-877-464-6638 Fax: (613) 482-1077 On 2011-03-09, at 10:15 AM, Leif Madsen wrote: > My fiancées family business is moving buildings and I'm installing a > new phone system for them based on Asterisk. Unfortunately I just > found out there is absolutely no line connectivity in their area > (which is crazy, it's a business area in Etobicoke, just on the south > side of Browns Line and Evans...). Anyways, they are with TeraGo > networks and have the wireless system setup. They have been using it > already as they are moving just to the building beside where they are > now. There is a tower on top of the building, and I was just there the > other day and hooked up my Polycom IP335 and use G722 across their > connection to my PBX located at Q9. > > A single call during business hours was fine. They have a 1.5Mbps > up/down connection and a 60GB plan per month that they never go over. > > I'm curious if anyone has used the wifi network for VoIP like this? > We'll be leaving 2-3 landlines for 911, fax, creditcard machine and > backup lines in case the network is down. They currently have about 6 > lines, with 5 used for voice right now. They would ideally like to be > able to handle up to 10 simultaneous calls. > > From my calculations of G.711 (64kbps) + overhead (about 24kbps) = > 88kbps per call, multiplied by 10 is 880kbps on a 1500kbps line, so > bandwidth isn't a huge issue. I'd further reduce that with G.729 to > get 8kbps + 24kbps * 10 = 320kbps. > > However, my concerns stem from latency, jitter, and dropped packets. > I'll be going on site to do some testing, but experiences and thoughts > are much appreciated. > > Thanks! > Leif. > > -- > Leif Madsen. > http://www.leifmadsen.com > http://www.oreilly.com/catalog/asterisk > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
