ASCOM Ascotel 2025 System Manual page 1121

ascom Ascotel 2025/2045/2065
PSI Paging System Interface
PSS1 Private Signalling System1
PSTN Public Switched Telephone Network
QSIG Signalling at reference point Q as per ITU
RAS Remote Access Service
RDT Remote Data Transmission
RE Recall
RU Radio unit
S S user-network interface
SC Subscriber
Se Basic access S external
SEM System Event Manager
SMB Small and medium-sized businesses
SMTP Simple Mail Transfer Protocol
SN Subscriber Number
T Basic access T
T2 Primary rate access T2
TA Terminal Adapter
TAPI Telephony Application Program Interface
TCP Transmission Control Protocol
TEI Terminal Endpoint Identifier
TFE Door intercom system
TON Type of Number
TSP Telephony Service Provider
TSPI Telephony Service Provider Interface
TSD Terminal Selection Digit
UG User Group
UUS User-to-User Signalling
UPS Uninterruptible Power Supply
9.4 Abbreviations HBT_20321104_09/B0_en