Amtsanschlüsse- S0 port, multiple device / PBX connection on S0 / Up0 internally switchable - base: 0-2 / Max: 3 analog dialup (DTMF, CLIP-enabled) - base: 0 / Max: 4 VoIP channels (SIP according to RFC 3261), on internally switchable - base: 0-4 / Max: 8 VoIP codecs on Official G.711, G.726, iLBCTeilnehmeranschlüsse- switchable S0 / UP0 ports, multi-device connection - basic: 0- 2 / Max: 6 analog ports, symmetrically, IWV / DTMF, CLIP / CNIP capable - basic: 8 / Max: 8 VoIP channels (SIP according to RFC 3261), on externally switchable base: 0-4 / Max: 8- VoIP codecs internally G.711, G.726, and iLBCVoicemail- Faxsystem- voicemail channels - base: 1 / Max: 4 fax channels - base: 0 / Max: 1- voicemail / fax boxes - Base: 1/0 / Max: 20 / 20- fax standard T.30 / T.38 ITU-T active and passive fax switch for analog AmtanschlüssenTürsprech- and Relaisanschlüsse- analog resp. VoIP Door Phone Systems - max. 8- doorbell inputs - depending on the analog / VoIP Türsprechsystem- door opening relay - depending on the analog / VoIP Türsprechsystem- actuators (relays) for a / b switch modules and IP switching relays - 24Weitere connectors- audio outputs for zone paging via analog ports (eg A / B audio box) - max. 4 Ethernet ports 10/100 Base-T (10/100 MBit / s twisted pair) - 1 USB Host V2.0 as Gebührendrucker- / memory connector - 1 module slots - 2Technical Data Power - Min.3, 2 W, max.55 W Dimensions (W x H x D) - 334 mm x 331 mm x 94.5 mm Weight (without expansion modules) - 1.600 g Compatible operating systems - Windows 7/8, Apple Mac OS X and Linux