Signalling between International Switching Centres (ISC) and Digital Circuit Multiplication Equipment (DCME) including the control of compression/decompression (Study Group 11)
This Recommendation describes a signalling interface between an International Switching Centre (ISC) and a Digital Circuit Multiplication Equipment (DCME) with a built in device controller that allows a per call control of various functions in the DCME in real time. It is based on the interface described in ITU-T Q.50 [1]. In addition to the functions described in [1] that can be controlled by the switch@ the compression/decompression function in the DCME can also be controlled. The DCME is of type 2 (see ITU-T Q.50 [1]). This interface is supported in E1-networks. The signalling interface defined in this Recommendation assumes a fixed relationship between the circuits of the ISC and the DCME. While this Recommendation is intended for use on international networks@ the information defined here may be used within national networks.