[Asterisk-Users] fxo connection in the UK

[Edward Eastman]

Most people get echo issues with x100p's in the UK due to mismatched
impedance, the newer TDM400P is much better, and you could get this with 3
FXO modules (otherwise known as a TDM03B I believe).

HTH

Ed


-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Peter Hoppe
Sent: 30 November 2004 12:14
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] fxo connection in the UK

Thank you very much for this hint. My apologies that I messed up a thread
for my post - I had a 
message open and simply clicked on the link ... slap slap.

Would anyone know of a better choice to multiplex three fxo lines into an
asterisk box? I can still 
use three Digium X100P cards, but methinks, a seperate unit would be better.

Thanks again,

Peter







>> I am located in the UK and am looking into connecting three analog BT
lines to an astersik system which 
>> is replacing our current pbx. I could use three Digium wildcard x100p
cards for that but I rather 
>> use a unit which is external to the computer to have a better separation
of analogue/digital side. I 
>> would not like to go ISDN because the analog lines have so far sufficed
in every repect and I tend 
>> not to fix what isn't broken.
>> 
>> Today I found a unit on a supplier's website
>> 
>>
http://www.peripheralcorner.co.uk/product_info.php/cPath/113/products_id/544
>> 
>> which is  a
>> 
>> Micronet SP5054 VoIP Gateway 4 FXO Ports
>> 
>> The website for this product is
>> 
>> http://www.micronet.info/Products/voip/SP5054.asp
>> 
>> 
>> and it appears to me that this unit would (similar to a channel bank)
multiplex our three BT lines 
>> into one LAN port. If so, I could simply connect such a box to a LAN port
in my asterisk server. I 
>> suspect the unit would appear to the asterisk box like three SIP-to-fxo
converters (sorry for the 
>> horrible beginner-jargon). I basically would like to know whether I could
use this unit instead of 
>> three x100P cards and it would functionally replace them.
>> 
>> Questions
>> 
>> 
>> * Would it be legal in the UK to connect such a unit to the PSTN ?
>>    In the specifications
>> 
>>      http://www.micronet.info/Products/voip/SP5054.asp#Specif
>> 
>>    there seems to be CE regulatory approval (see bottom row of table,
Emission),
>>    but I don't know whether that is sufficient for use with a PSTN in the
UK.
>> 
>> 
>> * Could I operate the unit in a transparent fashion, i.e. it would look
to the asterisk
>>    machine as if I had connected three SIP-to-fxo converters which I can
control
>>    independently of each other from the asterisk machine?
>>    For example, could I initiate / receive a phone call while another
phone conversation
>>    is running? For outgoing calls, could I specify which fxo port to use
/ for incoming
>>    calls, could I find out which port answered it?
>> 
>> 
>> * Would the fxo ports match the UK PSTN specifications (impedance)?
>> 
>> I am asking in this list just in case that someone has used / is using
such voip gateways. I am 
>> still very much in the enquiry phase. Thank you very much for your
consideration.
>> 
>> Peter


> On 29 Nov 2004, at 17:30, Peter Hoppe wrote:
> 
>  > Micronet SP5054 VoIP Gateway 4 FXO Ports
> 
> We bought one of these units and had a lot of grief with them. The SIP 
> firmware isn't great at all IMHO. For H.323 they work just fine.
> 
> Stephan Wik





-- 
There are 10 kinds of people in the world,
those who understand binary, and those who don't.



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