This Recommendation deals with electro-acoustic performance parameters of portable digital
cordless and mobile terminals. The requirements given below should ensure satisfactory voice
service in a high percentage of installations under normal conditions, but other factors impacting the
performance, such as the radio link, are not included.
This Recommendation includes specifications for handset, headset and speakerphone set of mobile
terminals. These specifications may be applicable to digital cordless handset, headset and
speakerphone sets. The requirements contained in this Recommendation apply only to narrow-band
systems (3.1 kHz) regardless of the coding algorithm used.
Specifications for speakerphone sets are recommended for handheld terminals and desktops.
Specifications for car mounted hands-free terminals will be included in a separate
Recommendation.
Requirements are given for handset, headset and speakerphone set in conjunction with a 0 dBr
4-wire reference (see Figure 1) base station having an appropriate air interface, and are specified
irrespective of the particular technology and air interface.