Channelized T1
An access line operating at 1.544Mbps that is subdivided into 24 channels of 56kbps each for dial-in use.
An ISDN PRI line provides 23 channels of 64Kbps capacity each, plus one 64Kbps signaling channel. However, channelized T1 is available in many service areas that do not yet provide ISDN PRI. In areas where PRI is available, the cost of channelized T1 might be significantly less than the cost of PRI.