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Who know the difference between E1 and 30B+D in PBX?

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Re: Who know the difference between E1 and 30B+D in PBX?

From a doc on Cisco’s site: “In countries using E1 span lines, ISDN PRI service provides transmission of digital data over 30 B-channels (64 Kbps) and one D-channel (64 Kbps) plus one framing channel (64 Kbps) for a total bandwidth of 2.048 Mbps using an E1 span line. This is sometimes referred to as 30B+D service.” There’s quite a bit of info on Cisco’s site.

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