I've been off forums the past few months doing some wireless equipment research. I currently have an all-MT 802.11b network (some 2ghz-5mhz stuff now too, and a separate all-5ghz-10mhz network too). I've been playing with Canopy 5.7 to deploy a new business VOIP network, but Canopy Advantage is 14Mbps (and with a 50/50 ratio, only 7Mbps each way, at best case). Those #'s are user data throughput, not radio speeds.
Canopy is supposed to offer up to 26 simultaneous calls per AP @ g711 with no increase using g729. I need this same performance, except I also want to be able to transport a few megs of data as well, which Canopy @ 26 calls means no more data left. I've only tested with 12 simultaneous calls so far (8 port Audiocodes FXS, 4 Grandstream ATAs). So far it's been so-so, even with a reflector. Canopy's whitepaper claims that the actual radio performance goes down to a dismal 4.2Mbps when loaded with calls - not good at all.
So I'm looking back to see if I can do this with a Mikrotik solution. I have done PTP links with MT having dual 60Mbps links. I'd like to be able to have up to 8 clients on an AP, and 26 SIP calls going, and have a few megs (I'm thinking 5 or 6) left for data. These 8 clients likely would have 10 lines each, and the server will be programmed to limit simultaneous calls per sector to 25 or 26. I'd like to investigate some form of dual-radio PTMP bonded solution as well so I can put 2 sectors per direction, a 5.3 and 5.8 using those Commex P4 MiniITX boards with dual MPCI slots.
I need some real world advice from you guys out there who do VOIP over Mikrotik PTMP. Is this a do-able thing? I don't know how well a single client's VOIP packets aggregate together on NStreme (like 10 SIP calls, will that meld into big packets easily?).
I'd also consider for the dual-radio setup some routing tricks so that one radio is dedicated for upstream, and one radio is dedicated for downstream. I wonder if the half-duplex problem were eliminated (and NStreme polling solves the hidden node), if I could actually run dozens of voice calls PTMP. Really the only other thing that would help would be some form of sync on the tower but that's a later thing anyhow and would mainly only help for frequency re-use.
Any input or suggestions?