I read somewhere that two Force 4625 Subscriber Modules can be used to create a P2P bridge. Is this correct?
It’s correct, but I would recommend using F4600C for backhaul links because of the better capabilities, like higher PPS, SFP port, built in GPS.
Thanks
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They work well for shorter distances. We have a few 4625 PTP links feeding minipops at less than a mile that have been solid. Our longest 4625 PTP link is feeding a small tower at 2.8 miles on a 40 Mhz channel getting 350+ meg, which is plenty for the location. For longer links or high utilization, the 4600C with a quality dish is the way to go, as Fedor mentioned. They are very stable with the 5.9.X software.
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I do have ptp 8 km link using F300-25, 80 MHz 360 Mbps+, RSSI -55. What speed I can expect using Force 4625 ?? Regarding the noice on 5 GHz, this link works on MCS8 only.
Hi Ziemowit,
I’m not sure this’ll be helpful or not? But the throughput of any wireless link is largely a function of things such as signal, signal per chain, noise, SNR, channel width, and then the resulting Modulation that the radios can achieve with all those factors. Obviously 4625’s are capable of significantly more (like 4x more) than 300-25’s are… but any radio only does it’s best when operating at maximum SNR & widths & modulations. So, if you’re only getting MCS8 DS (Dual Stream, 256-QAM 3/4) currently with the F300-25, then an F4625 may or may not be much difference, if it only arrives at the same modulation & channel width.
Of course, in 6Ghz, the noise may probably be much lower, and that might mean you may achieve a 1024-QAM modulation and maybe get 50% more throughput right there, but perhaps not. You could also move to wider channel widths, which could again increase bandwidth by another 50-100%, but that may also reduce SNR by a few db which might lose some of those gains.
That being said - have 400C (5Ghz) links with 34dBi antennas, getting the SNR & Modulations up to MCS11, and we can push dramatically more (like 4x more) than F300-25’s did in the same locations & distances & conditions. Here’s one doing 450 Mbit in 40Mhz wide channel, and this screen shot was back with firmware 5.1… with firmware 5.9.2 and moved to 80Mhz channel widths, we can do 900+ Mbit all day long.
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We are using Force 425 with range extenders on 80 MHz getting 800+ on 16 km link for example, but I would like to get some comparison of 4625 and 300-25. I hope we all know that there are many parameters that are involving for the link speed. RSSI SNR and fresnel zone are the basics.
In my link on F300-25 we do have clear fresnel zone, very good antenna alignment (RSSI) (-55) and nice SNR (37)
With 4625 we do have same dish size 470mm so theoretically on ~6,5 GHz we should get better antenna gain +1/2dbi, also we do have frequency very clear from noise. So we should get better MCS. We are speaking about 80 MHz channel width and for this settings was my question, we should get RSSI -53, I hope SNR 40+, what speed can I expect on 8km ?