cross-connect

A device that allows conductors or channels to be interconnected, either physically or

electronically, on a semi-permanent basis. A cross-connect can be in the form of a main distribution frame (MDF), intermediate distribution frame (IDF), or terminal block where wire pairs from cables are mechanically terminated on a punch-down block, with short wire jumpers interconnecting the cable pairs on each side of the block. A digital cross-connect (DXC), also known as a digital access cross-connect system (DACS), is a device that allows digital circuits (e.g.,T1s or E-1s), or even individual channels, to be crossconnected via an electronic cross-connect matrix. An optical cross-connect (OXC) is used in fiber optical transmission systems (FOTS). A cross-connect is much like a static switch in that connections can be changed to alter physical paths, but not on a call-by-call basis. See also DACS, DXC, FOTS, IDF, MDF, OXC, and switch.

• impedance (Z)
• Imperial Standard Wire Gauge
• IMP (Instant Messaging and Presence)
• Implementation Agreement (IA)
• Implicit Congestion Notification
• IMPP (Instant Messaging and Presence Protocol)
• Improved Mobile Telephone Service (IMTS)
• Improved Mobile Telephone Service (IMTS)
• impulse noise
• impulse noise
• IMS (IP Multimedia Subsystem)
• IMT-2000 (International Mobile Telecommunications-2000)
• IMTC
• IMTC (International Multimedia Telecommunications Consortium)
• IMT (InterMachine Trunk)
• IMTS (Improved Mobile Telephone Service)
• in-band signaling and control
• incident angle
• incremental redundancy (IR)
• incumbent local exchange carrier (ILEC)
• Independent Communications Authority of South Africa (ICASA)
• independent telephone company
• index-matching gel
• index of refraction (IOR)
• inductance (L)