Current Deployment Situation:
In APR Phase III Condominiums, the current plan is to get intercom and Broadband over FTTH only. We decided to drop xDSL completely because of the extreme asymmetry in upload and download speeds. Refer below URL for my 8 mbps Airtel Broadband performance:
With FTTH we usually get half the download speed as upload speed. Also intercom and voice as per current plan will also be delivered using FTTH. So for these services an ONT device will either be placed inside home or in the shaft and from which CATV, cat6 and telephone patch chords (cable) will be drawn.
Requirement:
When utility power fails, we want to have intercom continuity (if it fails it may take 5-15 min to get enabled after power comes back). Also most subscribers would want Broadband to continue so that their online sessions on video, chat, browsing, sync etc are not aborted suddenly due to networking failure. The facility has DG power backup and the power would come back in 5-60 seconds anyways, but we still need to protect against the short sub-minute outage. Which means the ONT, Router, switch etc must be put on UPS backup which can support 1 min standby time. If the service provider puts shared ONT in shaft he will provide batter y backup for it. But if teh ONT is inside your home, then you need to take care of it.
Concrete Solution:
Their are two ways to proceed on this:
- Ensure that the ONT, Router, Switch etc are in one place (preferably in a nice rack unit) and connected to an offline UPS like APC back-UPS Model No. APC BX600CI-IN (available for Rs 2000-2200 locally) and turn the battery saver mode off if outages are longer than 1 min. We have verified that this can support upto 1 hour backup for low power device and will solve the issue for 90% plus of the residents. It has also supports Automatic Voltage Regulation (AVR) and Surge Protection when on utility mode and is the best bang for buck as far as UPSes go ...
- A few residents want clean power for *ALL* their sensitive electronic device and deploy online (double conversion), Offline or Line interactive UPS at a phase level by connecting a high capacity UPS (2-3 KVA) to main Distribution box of flat. This is also a very good (albeit expensive solution) but will ensure your TV, fan, LED lights, one refrigerator, etc which is put on one phase can continue to operate whenever power fails apart from just your communication equipment. besides protecting them from surges and over-voltages.
Feel free to write to telecom[dot]aprp3association[at]gmail[dot]com if you need more clarifications/details.
- Suman Kumar Luthra @ APRC-P3 Telecom Sub-Committee
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