Sony Ericsson Cordless DT590 - Manual (Page 147)

147 MD Evolution – Cordless DT590
Reference
Reference
This section describes the terminology used on the display, the
phone communication signals, guidelines, technical specifications,
spare parts and accessories.
Terminology
The list below explains the terms which may appear on the display.
Terminology used on display
Term Meaning
DTMF Dual Tone Multi Frequency or touch tone, for dialling.
IPEI International Portable part Equipment Identity, unique
identity assigned to your Cordless phone by the
manufacturer.
PIN Personal Identification Number for security.