[Asterisk-Users] E1/T1 failover hardware

[Sergio Serrano]

http://www.junghanns.net/en/ISDNguard_produkt.html


srsergio

-----Mensaje original-----
De: John Daragon [mailto:john at argv.co.uk] 
Enviado el: jueves, 20 de octubre de 2005 17:24
Para: Asterisk Users Mailing List - Non-Commercial Discussion
Asunto: [Asterisk-Users] E1/T1 failover hardware

Warning ! I know zip about electronics.

I've been looking for a device to handle the switching of an E1 connection
from one Asterisk box to another in the event of a catastrophic server
failure.  All of the solutions I've seen so far have been designed to handle
the situation where the telco line faults so that the local PBX can switch
to a secondary E1.

I've come across this application note :

http://www.maxim-ic.com/appnotes.cfm/appnote_number/2857

which describes "T1/E1/J1, N+1 Redundancy With Analog Switches"

These parts are obviously designed to be built into E1 boards - hence, I
think, the protection circuitry.

Here's the question, then :  what (apart from jumping through regulatory
hoops) is to stop a simple array of MOSFETS (and a bit of control
circuitry) implementing a failover switch controlled (say) by a pin on a
serial or parallel port ?

jd

-- 

John Daragon                                          john at argv.co.uk
argv[0] limited
Lambs Lawn Cottage,  Staple Fitzpaine,  Taunton,  TA3 5SL,  UK
v +44 (0) 1460 234068   f +44 (0) 1460 234069   m +44 (0) 7836 576127


_______________________________________________
--Bandwidth and Colocation sponsored by Easynews.com --

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




-- 
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.12.4/143 - Release Date: 19/10/2005