ISDN & T1 lines
DerekAustin26
Member Posts: 275
in Network+
How can an ISDN Primary Rate Interface (PRI) be a full T-1 line when it only carries 23 B Channels?
A T-1 line is 24 DS0's not 23
A T-1 line is 24 DS0's not 23
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dkirk
Member Posts: 10 ■□□□□□□□□□
DerekAustin26 wrote: »How can an ISDN Primary Rate Interface (PRI) be a full T-1 line when it only carries 23 B Channels?
A T-1 line is 24 DS0's not 23
Check out this link:
T1 vs PRI - Telephone Tech Talk -
DerekAustin26
Member Posts: 275
Turns out ISDN PRI is a T1 cuz it has 24 DS0's. 23 B channels & 1 D Channel that is 64kbps.