Then there was the Primary Rate Interface (PRI) designed for interfacing to PBXes with (in the North American format) 23 64Kbps Bearer channels and a single 64Kbps D channel; thus 23B+D. PRI service ...
In our recent series on ISDN, we mentioned in our discussion of the E-1 version of an ISDN Primary Rate Interface that one of the 32 DS-0s was already used for control purpose, so there were only 31 ...
As carriers increasingly incentivize their customers to migrate away from copper TDM-based services through significant price increases or abrupt sunset notices, we've seen client activity increase as ...