[Asterisk-Dev] best approach for a new isdn driver mainly for asterisk.. ?!

[Gary]

On 29 Apr 2003 01:15:26 +0200, Patrick wrote:

>On Mon, 2003-04-28 at 23:57, Pauline Middelink wrote:
>> On Mon, 28 Apr 2003 around 08:30:45 -0700, Steve Brown wrote:
>> > This seems very reasonable. The call-level interface 
>> > (linux.../Documentation/isdn/INTERFACE) to i4l looks pretty straight 
>> > forward and would sure eliminate lots of moving parts.
>> > 
>> > Also, I'd think that an Asterisk system for a small business with 
>> > existing isdn lines would have to support both bri lines and the 
>> > currently-installed isdn phones. This would imply quite a few (probably 
>> > more than 4) TE and NT ports.
>> > 
>> > Why not use a channel bank with bri card(s) and a Digium E1/T1 
>> > interface? There is no hardware to design and build. The cards are 
>> > configurable as either TE or NT. They are already certified for use in 
>> > most countries. The layer 1 protocol is completely handled by the card 
>> > so an i4l hardware driver interface to zaptel should be easy. And 
>> > lastly, if you want to do this on a budget, used channel banks and bri 
>> > cards are pretty cheap. I recently bought a Premisys cb and six 8 port 
>> > bri-u cards on ebay and haven't yet spent $200.
>> 
>> Than you were lucky.
>> a) most of the eBay items i looked at wont be shipped to Europe
>>    (outside US).
>> b) for a professional business we can't rely on cheap buys from
>>    eBay, not if we want to stay in business ourselfs.
>> c) good channel banks with bri capabilites are expensive, so
>>    expensive that a few quad/oct BRI cards will win, esp. if
>>    they are based on the single chip solutions of Cologne.
>> 
>>     Met vriendelijke groet,
>>         Pauline Middelink
>
>I concur with Pauline. Today I checked eBay in The Netherlands, Belgium,
>UK, France, Germany and Italy and not a single channel bank on auction.
>Getting second hand channel banks from the US is still expensive, risky
>and thus not sustainable for a business.
>
>Regards,
>Patrick

Don't forget the E1 channel offer previously made here (I should find
it in the archives.....it was from Brendan Dooley)
.