james.wilson Posted January 5, 2011 Author Share Posted January 5, 2011 yes but you say some systems with 6 have issues. Installers need a way of checking a location is acceptable. On the old dualcom paknet based tester we had to check forward signal, reverse signal, bit error rate etc before deciding on a location. It seems if we are no using 'anything above 2 should be ok' then that is a backward step. There must be a way to test IF a location is acceptable else its fraught with issues? securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
jb-eye Posted January 5, 2011 Share Posted January 5, 2011 yes but you say some systems with 6 have issues. Installers need a way of checking a location is acceptable. On the old dualcom paknet based tester we had to check forward signal, reverse signal, bit error rate etc before deciding on a location. It seems if we are no using 'anything above 2 should be ok' then that is a backward step. There must be a way to test IF a location is acceptable else its fraught with issues? Reckon Jim answered a Q some sig companies dont want to. GPRS may have good strength but poor data and visa versa. Oh dear not what we need to hear. Customers! Link to comment Share on other sites More sharing options...
james.wilson Posted January 5, 2011 Author Share Posted January 5, 2011 id agree but nice to see some honesty for once about gprs. Im sure there is a workable way of setting it up. I think it has been proved that the current way has some serious failings. securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
jimcarter Posted January 6, 2011 Share Posted January 6, 2011 Now be careful guys in generalising on what is the minority. What we actually find in the field is that the vast majority of sites work perfectly well, day in, day out on GPRS. This is based on regular polling (and by this I dont mean once a day) and checking of the interfaces and signal. Then recoring this data and making it availble to you as the Installer. The real trick is to be able to identify your (say) top ten "worst" offenders and deal with them. If you have the right support from a provider who can tell you what these are, and what is the best remedial action, then this is a proper Managed Service. Relates closley to another post on another topic methinks? Jim Carter WebWayOne Ltd www.webwayone.co.uk Link to comment Share on other sites More sharing options...
IPAlarms Posted January 18, 2011 Share Posted January 18, 2011 The more frequently you poll the more accurate your statistical analysis of the circuit becomes. The flip side of this, is the more you poll, the more bandwidth you use and the higher the cost of the service. Don't the insurance companies dictate how often the device has to poll ? Free Alarm Monitoring over the Internet from IP Alarms Link to comment Share on other sites More sharing options...
jimcarter Posted January 18, 2011 Share Posted January 18, 2011 No they don't specify the polling rate but they do require you to report a line fail within a certain time frame depending on the grading of the system. It is down to the manufacturers to determine the polling regieme that identifies as accuratley as possible when a fail has occurred. For instanace, if you have a reporting time of 3 minutes (i.e. the circuit has been "dead" that long) you don't want to poll once every 3 minutes and report a fail on the loss of that single poll. You will soon end up with a lot of false alarms. You need to poll much faster than that and produce a fail after a number of consequetive poll fails. Hope that makes sense. Jim Carter WebWayOne Ltd www.webwayone.co.uk Link to comment Share on other sites More sharing options...
IPAlarms Posted January 18, 2011 Share Posted January 18, 2011 It is down to the manufacturers to determine the polling regieme that identifies as accuratley as possible when a fail has occurred. That makes sense if every GPRS connection were made equal - but they are not. Surely it should be down to the installer to decide on a system by system basis as to what the client side polling rate and server side checking interval should be. Are installers free to use the network SIM of their choice, or are they locked to the network partner of the solution manufacturer ? Free Alarm Monitoring over the Internet from IP Alarms Link to comment Share on other sites More sharing options...
Guest Oxo Posted January 18, 2011 Share Posted January 18, 2011 GPRS isnt reliable IMHO. Outages, no signals. Even dependant on weather. But it has its uses. Link to comment Share on other sites More sharing options...
jimcarter Posted January 18, 2011 Share Posted January 18, 2011 Not sure what you mean by each GPRS connection being equal...can you expand a little on this? Do you mean, say CSL's GPRS service should be, (but is not) the same as ours (WebWayOne)? However, no, it is not down to the installer to determine the speed of polling, and this is where installers need to understand how each service operates. The frequency of polling on GPRS governs the amount of bandwidth that is used and therefore the cost of the service. The data transport mechanism over IP (and I include GPRS here, as this is an IP based service) also has a dramatic impact. Those using TCP as their transport mechanism will be racking up far more bandwidth than UDP. Therefore they will cost more to run. So you need to ask the question of the Alarm Transmission System provider, what is their transport mechanism and how fast they poll the circuits when a: both are available and b: when one or the other has failed. I'd place a fair be that if they are running TCP and their SIM costs are low, then they are not polling very often. Most ATS providers of IP/GPRS or GPRS/PSTN services will provide you with the SIM card as part of the contract. It makes sense as this is sold via the ARC and helps with billing and admin for everyone. Where the installer (and the Insurer) does have control, is specifying the reporting time of the system and then matching the ATS providers equipment to their needs. Jim Carter WebWayOne Ltd www.webwayone.co.uk Link to comment Share on other sites More sharing options...
Guest Oxo Posted January 18, 2011 Share Posted January 18, 2011 Trouble is the reporting times ATM are dire. Link to comment Share on other sites More sharing options...
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