Serious alarm systems have their own cell phone built in. On 2013/Aug/13, at 11:56 AM, Paul Brooks wrote:
> On 13/08/2013 11:26 AM, Jan Whitaker wrote: >> Interesting article about the other sorts of services that hang off >> the current phone systems. >> >> http://www.theage.com.au/it-pro/government-it/alarms-may-not-work-with-nbn-20130812-hv1cl.html >> >> But if there are analog conversion ports on the termination boxes and >> the devices that connect to the analog network now do so >> successfully, AND we have been told our analog phones can connect to >> one of those ports, why wouldn't this just work? >> >> BTW, I have LOTS of phone outlets in my house. Assuming that in the >> 5-6 years still to go before NBN appears at my place (I am definitely >> not in the first 3 years of rollout), I'm assuming that my analog >> connection end-point would just be moved to connect to one of those >> analog ports. Right or wrong? > Its an issue that has been known and worked on for at least the past several > years, > has been the subject of several reports, and is currently the subject of a > Comms > Alliance workgroup looking at cabling practices. > > 'Standard' houses with standard phone sockets and no special considerations > can be > connected fairly readily so that the existing sockets all should continue to > work. > > Alarm systems - both security alarms and personal health alarms - cause two > problems. > 1) some of them use non-standard audio tones (NOT like modems and faxes) which > apparently have difficulty getting through the G.711 VoIP conversion > 2) many alarms are connected to a 'mode 3 socket', which has to be connected > in a > special place in the phone-point topology, closest to the first > socket/building entry. > If the NBN box is connected to the existing in-house wring at any random > socket, then > the 'mode 3' function doesn't work any more and the alarm system won't see any > dial-tone at all - so you need to be careful about how the in-house cabling is > connected to the NBN NTU > 3) alarm suppliers are paranoid about non-stop power, and don't like the > NBN's battery > backup, or that consumers might not keep battery backup. If the mains power > fails the > alarm system usualy has a backup battery, but thats not much use if the phone > socket > is dead because the NBN NTU has lost power. > > If you're interested further see > http://commsalliance.com.au/__data/assets/pdf_file/0008/23957/NBN-End-User-Premises-Handbook---Release-2-Jun10.pdf > for an early look at home cabling issues, that also discusses alarm systems. > > > > > Paul. > > > > _______________________________________________ > Link mailing list > [email protected] > http://mailman.anu.edu.au/mailman/listinfo/link -- Kim Holburn IT Network & Security Consultant T: +61 2 61402408 M: +61 404072753 mailto:[email protected] aim://kimholburn skype://kholburn - PGP Public Key on request _______________________________________________ Link mailing list [email protected] http://mailman.anu.edu.au/mailman/listinfo/link
