You should consider the switching performance of the RouterBoard (in terms of packets per second, pps), not only the the throughput.Each voice call with good quality would take about 64Kbps full duplex, so about 125 calls I would guess.
Is this wired or wireless, witch routerboard?For Mikrotik products 100 simultaneous calls on a routerboard it would be a good limit.
It's not the board but the Radio. You should use Nstreme for P2P links, this will make PPS much better by putting small packets into bigger wireless frames but will also cause jitter if traffic isn't high enough for these "jumbo frames" to flow because Nstreme can "hold back" packages until frame is filled up.. Also your links need to be perfect before running Nstreme.. One dropped Nstreme frame will mean a lot of dropped VOIP packages..Ok, so using RB532 as P2P WDS transparent bridge, you can only push 8000pps?
Any better board for P2P use?
Well, according 2 me, 532 is a really good card, if u want to do something with 13x, mmmmm.Is this wired or wireless, witch routerboard?For Mikrotik products 100 simultaneous calls on a routerboard it would be a good limit.
Does this mean that you would get 22000-23000PPS?
I`m asking this because I was planing to use MT for backbone also, but if it can only handle 8000PPS wireless with the best routerboard available it`s not an option.
This is radios in general i think. You have a certain limit within the 802.x protocols. This is why Nstreme is so handy. SIP is always a problem because of the small packets and unless you have some wireless gear that can do small packets you have to go with Nstreme if you want to move a lot of SIP. I use Nstreme on our backbone links and it works great. I have no exact number on amount of simultaneous calls though.Ok, this is R52 limitations, or all compatible radio cards?