[Asterisk-Users] E1/T1 configurations

[Steve Totaro]

> Hi,
> 	If you were to lead someone (with a UI) through the process of
> configuring a a Digium T1/E1 card with asterisk and a T1/E1 trunk from
a
> provider, would the following questions cover most scenarios? i.e.
given
> the following questions and assumptions, would the configurations
below
> work for most people?
> 
>   - Is it a E1 or T1 line (i.e. are you in Europe or America)?
> 
>   - If it's a T1 line, is it PRI ISDN or E&M?
> 
>   - If it's a T1 does it use Extended Super Frame (ESF/D5) framing or
>     is it Super Frame (SF/D4) framing?
> 
>   - If it's an E1, does it use High-density Bipolar-3 (HDB3) or
>     Automatic Mark Inversion (AMI) coding?
> 
> 
> 	And given the following assumptions:
> 
>   - If it's an E1 voice line, it's going to be PRI which implies CCS
>     framing
> 
>   - ESF framing on a T1 generally implies B8ZS coding and SF implies
>     AMI coding
> 
>   - If it's a T1 PRI, it's most likely a National 2 switch; if it's an
>     E1 PRI, it's EuroISDN
> 
>   - 0db LBO in most cases
> 
>   - Most E1 lines use a crc
> 
>   - Wink start is usually used with E&M signalling
> 
> 
> 	You'd then have have a set of configurations like:
> 
>   - T1, PRI, ESF
> 
>       zaptel.conf:
> 
>         span=1,1,0,esf,b8zs
>         bchan=1-23
>         dchan=24
> 
>       zapata.conf:
> 
>         switchtype=national
>         signalling=pri_cpe
>         context=incoming
>         group=1
>         channel=>1-23
> 
>   - T1, PRI, SF
> 
>       zaptel.conf:
> 
>         span=1,1,0,d4,ami
>         bchan=1-23
>         dchan=24
> 
>       zapata.conf:
> 
>         switchtype=national
>         signalling=pri_cpe
>         context=incoming
>         group=1
>         channel=>1-23
> 
>   - E1, PRI, HDB3
> 
>       zaptel.conf:
> 
>         span=1,1,0,ccs,hdb3,crc4
>         bchan=1-15
>         dchan=16
>         bchan=17-31
> 
>       zapata.conf:
> 
>         switchtype=euroisdn
>         signalling=pri_cpe
>         context=incoming
>         group=1
>         channel=>1-23
> 
>   - E1, PRI, AMI
> 
>       zaptel.conf:
> 
>         span=1,1,0,ccs,ami,crc4
>         bchan=1-15
>         dchan=16
>         bchan=17-31
> 
>       zapata.conf:
> 
>         switchtype=euroisdn
>         signalling=pri_cpe
>         context=incoming
>         group=1
>         channel=>1-23
> 
>   - T1, E&M, ESF
> 
>       zaptel.conf:
> 
>         span=1,1,0,esf,b8zs
>         e&m=1-24
> 
>       zapata.conf:
> 
>         signalling=em_w
>         context=incoming
>         group=1
>         channel=>1-24
> 
>   - T1, E&M, SF
> 
>       zaptel.conf:
> 
>         span=1,1,0,d4,ami
>         e&m=1-24
> 
>       zapata.conf:
> 
>         signalling=em_w
>         context=incoming
>         group=1
>         channel=>1-24
> 
> Thanks,
> Mark.


Not all E1 providers have crc4 turned on.

Thanks,
Steve