Summary

Signal processing functions (SPFs) designed for speech quality, when located in the network, may interact with in-band signalling (e.g., tandem free operation) and non-voice services (e.g., high speed circuit switched data). The platform that carries these SPFs is called signal processing network equipment (SPNE) and may therefore need to provide mechanisms/auxiliary functions to support in‑band signalling and non-voice services depending on where in the network the SPNE is going to be deployed and what services and/or in-band signalling are present. This Recommendation defines these mechanisms/auxiliary functions of a signal processing network equipment (SPNE) designed for the use in the circuit switched part of a network (mobile, fixed and hybrid).