I understood your post, but I was hoping maybe you experienced the difference ...
However I will go for my idea with queue threads for each gateway that will send independently, each thread via it's own gateway as soon as the gateway is available >From my tests I found out that the delay between SMS-es sent via different gateways is 1.5 - 3 seconds. I think at hardware level ( USB communication ) there is no way I could get that much delay. I'll post my results as soon as I'll implement it Regards. On Tuesday, July 31, 2012 6:13:16 PM UTC+3, Nizam wrote: > > Sorry, my post wasn't related to the performance question. It was in > response to your doubt regarding the 8 port modem connectivity. Avoid hubs > to improve the reliability of your solution. > > --Nizam > > On Tuesday, July 31, 2012 8:22:05 PM UTC+5:30, MaxX wrote: >> >> I am inserting the modems ( the 2 currently I have ) into a USB port >> each. I assume the modem contains some kind of USB to serial converter ... >> So I am not using a HUB but that's what the driver is being recognized by >> the OS >> >> I didn't have any port lockouts so far ... and I am using Linux ( CentOS >> 6.2 ) >> Still my question holds ... would serial modems make any difference in >> terms of performance ? >> Anyone had any experience with both ? >> >> Regards, >> MaxX >> >> >> On Tuesday, July 31, 2012 5:42:50 PM UTC+3, Nizam wrote: >>> >>> Serial-USB-Serial conversion is better avoided if possible. If going for >>> the USB option make sure you have enough USB ports on the server itself >>> without having to introduce a USB hub. I've tried many hubs and all of them >>> ended up causing frequent port lockups on Windows. >>> >>> On Tuesday, July 31, 2012 5:56:35 PM UTC+5:30, MaxX wrote: >>>> >>>> Thanks for your answer ... >>>> >>>> I have 2 modems each one in an USB port >>>> i've been testing different setups with my USBs ports to try to find >>>> best setup. After your email I thougt that if I put them in different >>>> ports >>>> / motherboards hubs will make any difference. but it didn't >>>> >>>> 1st question that I have now is if serial modems will make any >>>> difference. I plan to buy a 8 port modem pool and I can't decide if to buy >>>> USB or RS232 ( via multiserial board ) >>>> >>>> 2nd one is actually an ideea ... to create a QueueManger thread for >>>> each gateway and eventually have 10 paralel threads for 10 modems ending >>>> with the possibility to send independently SMS via 2 modems (almost) at >>>> the >>>> same time >>>> >>>> Not sure how QueueManger is implemented now ... I'll dig into it >>>> >>>> Regards, >>>> Marius >>>> >>>> >>>> >>>> On Saturday, July 28, 2012 12:06:19 PM UTC+3, T.Delenikas wrote: >>>>> >>>>> Well, I tried to find something (like a recent change in code, >>>>> perhaps) that could justify this, with no luck. >>>>> On the other hand, this issue has been reported again recently, so >>>>> something is really going on here... >>>>> >>>>> The really bad thing is that I currently don't have access to a >>>>> multi-serial board in order to test things. >>>>> I've seen that USB hubs (or maybe their drivers?) sometimes appear as >>>>> if they lock concurrent port access. I am not the most appropriate person >>>>> to follow low-level specs and controller capabilities, but I've seen >>>>> articles like this: >>>>> http://www.avsforum.com/t/1277379/recommendation-please-most-reliable-self-powered-7-port-usb-hub >>>>> >>>>> which suggest that low-level hubs may indeed have a problem allowing >>>>> concurrent access to all ports. I've seen terms like " *Supports 4 >>>>> Concurrent Non-periodic Transactions* ". I guess that all of these >>>>> references have something to do with the hub's ability to allow >>>>> concurrent >>>>> port access and how many individual controllers they have (i.e. ports per >>>>> controller ration). Do you or anybody else know something about it??? >>>>> >>>>> Needless to say that such hubs have a cost of $50 - $100 + - check >>>>> this one: http://www.cooldrives.com/12poinusb20h.html and have >>>>> nothing to do with the $10 hubs found in every stupid accessory store... >>>>> >>>>> On Thursday, July 26, 2012 9:54:21 PM UTC+3, MaxX wrote: >>>>>> >>>>>> >>>>>> modems via USB ... >>>>>> pl2303: Prolific PL2303 USB to serial adaptor driver >>>>>> >>>>>> -- You received this message because you are subscribed to the Google Groups "SMSLib Discussion Group" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msg/smslib/-/sKWOCcepcKYJ. For more options, visit https://groups.google.com/groups/opt_out.
