[Asterisk-Users] Re: E1's and span - what questions to ask my service provider

[Vikram Rangnekar]

thanks you for the information its extremely useful.


+++ Peter Svensson [04/02/05 08:59 +0100]:
> On Fri, 4 Feb 2005, Michael Bielicki wrote:
> 
> > It's even easier. If you are taking an E1 with euroisdn, the D-channel
> > will allways be nr. 16. In neary all cases the rest of the settings
> > will be: ccs,hdb3 and depending on the carrier crc4.
> 
> Other things you will need to agree on / know:
> 
>  * Number of DID digits sent (usually the last 3-4 or all digits)
>  * Number of digits and numbering plan for your outgoing callerid 
>    (Calling Number on outgoing calls)
>  * The numbering plans used for incoming caller id 
>    on national/international calls.
>  * The numbering plan expected for the called number on outgoing calls.
>  * channel selection order. Normally a net end will hunt ascending 
>    and a cpe interface will hunt descending. Make sure you are hunting
>    in the opposite direction of the other end. This removes the risk of
>    both ends trying to sieze the same B channel at the same time.
>    Configured in Asterisk through the use of 'g' or 'G' on the channel 
>    specification.
> 
> Peter
> 
> 
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-- 
regards
Vikram (http://www.vicramresearch.com)