[Asterisk-Users] Mediatrix voip gateway 1124 and 1204 in UK setting

[David John Walsh]

Peter

One thing to consider if you only have 3 PSTN lines is the Sipura 
SPA-3000 (you would need 3 of them, one for each line)

We have 2 PSTN lines at our scout campsite, and they work very well, as 
well as providing a simple power outage solution.

They retail about £80 + the VAT

I can supply more information once you have looked at the devices.

Regards
David
On 24 Jan 2005, at 11:20, Peter Hoppe wrote:

> Hello!
>
> We are located in the UK, and we are planning to replace our old pbx 
> with an asterisk based pbx. For outgoing calls our present pbx is 
> connected to three PSTN lines which all have the same number. 
> Internally, the pbx caters for quite a few extensions, and each 
> extension can make outbound phone calls. Only very rarely does our 
> call volume exceed three simultaneous connections (inside to inside 
> plus inside to outside).
>
> We have looked into the issue of connecting the phones and the outside 
> lines to the system.
>
> For the fxo connectivity we want to stick with the three PSTN lines, 
> because they worked for us and we don't see a need to upgrade to ISDN. 
> The asterisk system will be also connected to the internet anyway so 
> we can perform VOIP calls.
>
> For the fxs connectivity we want to re-use the old telephone wiring 
> and provide standard two-wire telephones. Putting in IP phones would 
> mean a massive installation effort, as we would have to put an entire 
> new computer network in place - plus many IP phones constantly 
> connected to mains, plus admin headaches, plus security issues and so 
> on. The two wire solution seems the best solution for our setting.
>
> We have looked into using a channel bank for the analog conectivity, 
> and we are currently in contact with Carrier Access to purchase a new 
> Adit 600 unit with space for 48 extensions. We cannot provide fxo 
> connectivity via the channel bank because the fxo card from CA seems 
> not to be EU approved. One downside of the channel bank is that we 
> need a special T1 card for it to operate with the asterisk pbx. Also, 
> channel banks seems to be a particular US concept, so we would have 
> difficulties to get replacement parts, if something breaks.
>
> Recently I heard of the alternative solution of a voip gateway, and 
> the particular units I have seen are the Mediatrix 1124 for fxs 
> connection and the Mediatrix 1204 for the fxo connection. Both units 
> support the SIP protocol, so it should be possible to connect them to 
> the asterisk PC via standard network connection. Mediatrix seems to 
> have resellers in Europe as well, so it might be possible that their 
> devices are Europe approved as well.
>
> Question:
>
> * Does anyone have any experience with these units in a UK setting?
>
> * For the 1124: Does it work with standard UK two wire phones? Are 
> there impedance problems
>         (especially concerning echo problems)?
>         Is the audio quality sufficient? Are they transparent to the 
> asterisk system, i.e.
>         does each fxs port look like a separate IP phone to the 
> asterisk system?
>
>
> * For the 1204: Would it be approved for connection into the UK PSTN 
> (The prospectus from Mediatrix
>         didn't say anything about regulatory approvals)? Can they 
> initiate outside calls / receive
>         incoming calls or are there problems (signalling compatible 
> with UK PSTN)? Are they
>         transparent to the asterisk system, i.e.does each fxo port 
> look like a separate IP phone
>         to the asterisk system?
>
>
> I do realize that these questions are quite broad, but do appreciate 
> any info. Thank you very much for your consideration.
>
>
> -- 
> dyslexics of the world - untie !
>
> _______________________________________________
> 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