Re: [WISPA] true thru for Trango 900
Probably yes, but not necessarilly. It really depends on how much all the non-guaranteed users are using. My average usage per business client is 16 kbps average usage 95%tile. If your business clients have similar usage statistics, you'd do fine with the Trango capable of pushing 2.5 mbps. One of the things to understand is that most all Internet service types (T1s, DSL) are also effected by packet size just like the radio links. So if you are comparing guaranteed bandwdith T1s at 1500 mtu, its fair to compare it to Trango at full 1500 mtu. The secret is to have good bandwidth management that works on a PRIORITY basis. If the Hospitol has guaranteed bandwdith, the hospitol's bandwdith ALWAYS gets sent through first. The big advantage of wireless is it gives you the abilty to sell unused bandwidth allocated to one client to others at a lower prioirty. The question you need to ask your self is not wether you are selling the hospitol guaranteed bandwdith, it wether the hospitol uses an average of the bandwdith speed (1.5mbps) that you are selling them. If they are likely to sustain that speed for long periods of time, then maybe the additional radio is needed. Tom DeReggi RapidDSL Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: Mac Dearman [EMAIL PROTECTED] To: 'WISPA General List' wireless@wispa.org Sent: Thursday, June 15, 2006 5:53 PM Subject: RE: [WISPA] true thru for Trango 900 Thanks for the reply Tom. The reason I asked was I just sold a dedicated T1 to a hospital and they are currently on one of my Trango 900 AP's along with 10 other businesses. After reviewing what you posted it looks like I better hang another 900 AP just for them or find another solution! Thanks, Mac Dearman -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom DeReggi Sent: Thursday, June 15, 2006 4:46 PM To: WISPA General List Subject: Re: [WISPA] true thru for Trango 900 Mac, As long as you are running the wired Ethernet side on 100mbps, We have been able to get an aggregate speed of 2.4 mbps in the lab and in live deployment, with average size packets. (Unfortuneately I do not remember what we declared as average size packets, but it may have been windows minimum limit of around 500 mtu). (for example 1.2 mbps in each direction simultaneously or 2.4 mbps in one direction) One way, with full size packets, we could get as high as 2.9 mbps in a lab environment. Take note that if you run the Trango at wired 10mbps ethernet, and small packets, the radio total throughput drops significantly, even though 3mbps RF is 1/2 less than the wired 10 mbps spec. Since those tests we alway run the 900 radios at 100mbps wired ethernet, when ever we can. With large packets I don't think it made much difference. We were surprised at the results. But this was an issue for us because we had installed the APs at 500ft using 10 mbps. It was the reason for a noticeable degregation of speed compared to what our original lab tests that were higher using 100mbps. To answer your question specifically, we noticed very little difference on which direction the data was going or at what percentage was going in each direction. Thats the big advantage of TDD systems and half duplex. Obviously there has to be some degregation, but not a large enough amount that we could measure it with our tools. We believe half duplex to be more efficient and less wasteful of spectrum. But that only applies when a radio can switch the direction it sends data without degregation of speed. Tom DeReggi RapidDSL Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: Mac Dearman [EMAIL PROTECTED] To: 'WISPA General List' wireless@wispa.org Sent: Thursday, June 15, 2006 1:13 PM Subject: RE: [WISPA] true thru for Trango 900 Has anyone ever done a test on Trango's 900MHz gear? I know it says 3Megs throughput, but what will it really do full duplex? Thanks, Mac Dearman -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
RE: [WISPA] true thru for Trango 900
Has anyone ever done a test on Trango's 900MHz gear? I know it says 3Megs throughput, but what will it really do full duplex? Thanks, Mac Dearman -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
Re: [WISPA] true thru for Trango 900
Mac, As long as you are running the wired Ethernet side on 100mbps, We have been able to get an aggregate speed of 2.4 mbps in the lab and in live deployment, with average size packets. (Unfortuneately I do not remember what we declared as average size packets, but it may have been windows minimum limit of around 500 mtu). (for example 1.2 mbps in each direction simultaneously or 2.4 mbps in one direction) One way, with full size packets, we could get as high as 2.9 mbps in a lab environment. Take note that if you run the Trango at wired 10mbps ethernet, and small packets, the radio total throughput drops significantly, even though 3mbps RF is 1/2 less than the wired 10 mbps spec. Since those tests we alway run the 900 radios at 100mbps wired ethernet, when ever we can. With large packets I don't think it made much difference. We were surprised at the results. But this was an issue for us because we had installed the APs at 500ft using 10 mbps. It was the reason for a noticeable degregation of speed compared to what our original lab tests that were higher using 100mbps. To answer your question specifically, we noticed very little difference on which direction the data was going or at what percentage was going in each direction. Thats the big advantage of TDD systems and half duplex. Obviously there has to be some degregation, but not a large enough amount that we could measure it with our tools. We believe half duplex to be more efficient and less wasteful of spectrum. But that only applies when a radio can switch the direction it sends data without degregation of speed. Tom DeReggi RapidDSL Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: Mac Dearman [EMAIL PROTECTED] To: 'WISPA General List' wireless@wispa.org Sent: Thursday, June 15, 2006 1:13 PM Subject: RE: [WISPA] true thru for Trango 900 Has anyone ever done a test on Trango's 900MHz gear? I know it says 3Megs throughput, but what will it really do full duplex? Thanks, Mac Dearman -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
RE: [WISPA] true thru for Trango 900
Thanks for the reply Tom. The reason I asked was I just sold a dedicated T1 to a hospital and they are currently on one of my Trango 900 AP's along with 10 other businesses. After reviewing what you posted it looks like I better hang another 900 AP just for them or find another solution! Thanks, Mac Dearman -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom DeReggi Sent: Thursday, June 15, 2006 4:46 PM To: WISPA General List Subject: Re: [WISPA] true thru for Trango 900 Mac, As long as you are running the wired Ethernet side on 100mbps, We have been able to get an aggregate speed of 2.4 mbps in the lab and in live deployment, with average size packets. (Unfortuneately I do not remember what we declared as average size packets, but it may have been windows minimum limit of around 500 mtu). (for example 1.2 mbps in each direction simultaneously or 2.4 mbps in one direction) One way, with full size packets, we could get as high as 2.9 mbps in a lab environment. Take note that if you run the Trango at wired 10mbps ethernet, and small packets, the radio total throughput drops significantly, even though 3mbps RF is 1/2 less than the wired 10 mbps spec. Since those tests we alway run the 900 radios at 100mbps wired ethernet, when ever we can. With large packets I don't think it made much difference. We were surprised at the results. But this was an issue for us because we had installed the APs at 500ft using 10 mbps. It was the reason for a noticeable degregation of speed compared to what our original lab tests that were higher using 100mbps. To answer your question specifically, we noticed very little difference on which direction the data was going or at what percentage was going in each direction. Thats the big advantage of TDD systems and half duplex. Obviously there has to be some degregation, but not a large enough amount that we could measure it with our tools. We believe half duplex to be more efficient and less wasteful of spectrum. But that only applies when a radio can switch the direction it sends data without degregation of speed. Tom DeReggi RapidDSL Wireless, Inc IntAirNet- Fixed Wireless Broadband - Original Message - From: Mac Dearman [EMAIL PROTECTED] To: 'WISPA General List' wireless@wispa.org Sent: Thursday, June 15, 2006 1:13 PM Subject: RE: [WISPA] true thru for Trango 900 Has anyone ever done a test on Trango's 900MHz gear? I know it says 3Megs throughput, but what will it really do full duplex? Thanks, Mac Dearman -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
