[Asterisk-Users] WiFi IP Phones

[Anton Krall]

Thank you very much for the explanation Terry.

I knnew some of this stuff (point 1 and 2) and this client is requesting IS
equip specifically so you couldn’t be more right.

Im dealing with this thru a 3rd party (the client is a client his).

Im just in charge of finding out the viability of using asterisk with IS
wifi phones if there are any.


|-----Original Message-----
|From: asterisk-users-bounces at lists.digium.com 
|[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
|Terry H. Gilsenan
|Sent: Miércoles, 15 de Junio de 2005 11:29 p.m.
|To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
|Subject: RE: [Asterisk-Users] WiFi IP Phones
|
| 
|
|> -----Original Message-----
|> From: asterisk-users-bounces at lists.digium.com
|> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Anton 
|> Krall
|> Sent: Thursday, 16 June 2005 6:53 AM
|> To: Cory at VOIPSupply.com; 'Asterisk Users Mailing List - 
|Non-Commercial 
|> Discussion'
|> Subject: RE: [Asterisk-Users] WiFi IP Phones
|> 
|> I know... The term "anti explosive" is new to me.. I never 
|heard of it 
|> but a possible client is asking for that exactly since the 
|phones are 
|> going to be used in oil refinary and r&d platforms using voip over 
|> satelite connections...
|> 
|> What do you think?
|> 
|> BTW, how is voip over satelite? I know you have the usual 500 ms lag 
|> for up and down stream delays but hows quality?
|
|Anton, 
|
|1, Intrinsically Safe is a _Requirement_, not an option on an 
|oil rig, refinery, etc... There are a few "Zone Categorys" 
|within the IS framework, and different equipment is certified 
|by an independent body to pass different tests, and so get 
|different ratings. 
|
|2, Each and every IS certified device is shipped with a 
|Certificate explaining the _exact_ rating and zone category 
|that the item has been certified for. This certificate will be 
|tied to the device by serial number.
|
|3, Each and every IS certified device and its powersupply are 
|tagged with a green <Ex> or Fm sticker that displays the Zone 
|category for which they have been certified, this _Must_ match 
|the details of the accompanying Certificate.
|
|4, Using non IS equipment in an IS zone will likely void any 
|and all private, public, and other insurance for the entire 
|site, and most likely result in the "On the spot" dissmissal 
|of the person that brought the non IS device on-site, and will 
|at the very least cause a muster and possibly a shutdown that 
|in the case of an offshore oil platform could cost about 
|$10Million in lost production before the plant could re-start.
|
|5, How do I know this? I work for an oil company and it is my 
|job to make sure that IS regulations are followed. Ie: my job 
|is on the line.
|
|6, VoIP works fine over vsat, there is a slight delay, but it 
|is easy to get accustomed to it. In fact the quality can be 
|better than some intercontinental voice calls using telco's as 
|the pipe.
|
|Further, there are sections of a refinery or oil rig that are 
|not IS zones,
|eg: Sleeping quarters, mess(canteen) An asterisk box could be 
|located there and added to the existing OF infrastructure, or 
|added to existing IS certified equipment using TDM cards.
|
|On the platform itself they will need both an IS Intercom and 
|handheld IS VHF or UHF radios (Both for HSEQ reasons)
|
|I hope this helps
|
|T
|
|_______________________________________________
|Asterisk-Users mailing list
|Asterisk-Users at lists.digium.com
|http://lists.digium.com/mailman/listinfo/asterisk-users
|To UNSUBSCRIBE or update options visit:
|   http://lists.digium.com/mailman/listinfo/asterisk-users
|