[Asterisk-Users] Prefered server hardware

[Scott Stingel]

I think it's cheaper (and more efficient) for the telco's to provide a 
large bank of batteries to provide the -48 volt power used in a lot of 
their equipment and services, rather than use a typical inverter system 
to convert battery DC voltage to AC.   I've been in rooms where there is 
a complete wall with dozens of very large batteries - enough I imagine 
to run the CO for hours (maybe days).

Yes, you can buy giant PBX switches from the major vendors with -48 DC 
power supplies instead of AC.

The reason for an asterisk system to be able to work from -48v is really 
only if the end-user customer requires it as part of a spec. - I would 
think only a minority of sites would require this though.    These days, 
most equipment rooms I've been in can supply lots of backed-up AC.

regards
Scott Stingel

www.evtmedia.com




Erick Perez wrote:

>so the switches, etc have two power interfaces? one for the -48dc and
>the other for the AC plug? or you must specifically buy -48vdc
>equipment?
>
>besides being used by telcos....any other advantage? power saving? noise?
>
>
>On Tue, 18 Jan 2005 11:35:55 -0800, Scott Stingel <scott at evtmedia.com> wrote:
>  
>
>>-48m volt power is often used in telco central office environments,
>>where the C.O. provides a huge amount of battery-backed up power to the
>>switches and to power the local loops in the event of an AC power failure.
>>
>>Regards
>>Scott Stingel
>>
>>Emerging Voice Technology, Inc.
>>
>>www.evtmedia.com
>>
>>----------------
>>
>>Erick Perez wrote:
>>
>>    
>>
>>>This question is for my own knowledge....i have no experience on this
>>>"electrical" area.
>>>why do you want to run -48vdc equipment? what's the advantage of doing that?
>>>
>>>
>>>On Tue, 18 Jan 2005 13:58:59 +0100, Daniel Nyström
>>><daniel.nystrom at westel.se> wrote:
>>>
>>>
>>>      
>>>
>>>>What server hardware would you recommend for an Asterisk system which are really critical?
>>>>The additional hardware will probably be two digium TE110P cards, and an Adit 600 platform.
>>>>
>>>>If it's possible to run on -48VDC, It would be great!
>>>>
>>>>Are there any experiences with any HP or FujitsuSiemens systems? Or other "complete server" systems?
>>>>
>>>>Thanks!
>>>>
>>>>BR
>>>>Daniel Nyström
>>>>_______________________________________________
>>>>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
>>>>
>>>>
>>>>
>>>>        
>>>>
>>>
>>>
>>>      
>>>
>>_______________________________________________
>>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
>>
>>    
>>
>
>
>  
>