Siemens optiPoint 500 Service Manual page 118

Abbreviation Definition
ISDN Integrated Services Digital Network
ISO International Standard Organization
Keys Key Matrix
LAP-D Link Access Procedure on the D-channel
LCD Liquid Crystal Display (with standard and modular telephones only)
LED Light-Emitting Diode
Lsp. Speaker for ringer, open listening and speakerphone mode
Mikr. Microphone (with optiset E standard, advance plus, and memory telephones
only)
OTO Optiset Teleworking Option
PC Personal Computer
PC-AC PC Attendant Console
PNT Private Network Termination
Power Power supply for options, 5 V and 21 - 56 V (from U
RJ MWxx connector
RNG Call Number Generator (optiset E key module)
RS232 Data Interface (optiPoint data adapter)
SAR-T SAR-T relay
SLMQ Subscriber Line Mode Q
Smartlink Line chip for U
SNG Local Power Supply Unit
SPI bus Serial Peripheral Interface (serial data bus)
TA Terminal adapter: Adapter port (20-pin terminal strip)
TAPI Telephony Application Programming Interface
U Trunk interface to the communication server (RJ 11)
P0/E
UCON Previous name for distance adapter
Y-2
access
P0/E
)
P0/E
P31003-E8400-A100-3-7620
Service Manual