VoIP
SIP - Session Initiation Protocol RFC 3261
Support of STUN (Session Traversal Utilities
for NAT) for systems behind firewalls
Configurable SIP server per line
POTS
Supporting worldwide country types,
configurable via software (regarding
impedances, levels and ringing signals).
Separate country type settings for Main
Exchange or PBX lines
Busy tone measurement for automatic
hang-up
Caller ID (via DTMF, FSK SDMF, FSK MDMF)
ISDN
Euro ISDN
Supporting Multiple Subscriber
Numbers (MSN)
US ISDN (NI-1)
Supporting Service Provider
Identifications (SPID)
Supporting Directory Numbers (DN)
Japanese ISDN
Supporting Multiple Subscriber
Numbers (MSN)
Line Protocols
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