[Asterisk-Users] Difference between E1 and PRI

[Cole Technical Services]

E1 is a European T1. T1/E1 is the transport. PRI is the protocol. PRI on an
T1 id 23B+D, PRI on an E1 is 30B+D.

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Eric Wieling
> Sent: Wednesday, February 23, 2005 7:50 AM
> To: Eric Bishop; Asterisk Users Mailing List - Non-Commercial 
> Discussion
> Subject: Re: [Asterisk-Users] Difference between E1 and PRI
> 
> 
> Eric Bishop wrote:
> 
> > Hi all,
> > 
> > I have seen the term E1 and PRI used interchangably when 
> referring to
> > a voice service with 30B channels and 1 D channel. Are they just
> > different terms for the same thing or is there some technical
> > difference. Even Newton's telco dictonary seemed a bit fuzzy on this
> > topic. I have seen it said the PRi is a protocol that runs on top of
> > E1. Is this true?
> 
> Think of E-1 as Ethernet (transport) and PRI as IP (protocol).
> 
> You could also think of E-1 as IP and PRI as TCP.
> 
> You can also think of E-1 as TCP/IP and PRI as FTP.
> 
> 
> 
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