Required for each 3rd-Party SIP telephone or ST500 Cell App
Not required for SL2100 IP telephones or ML440 handsets
Requires VOIP channel (8 are built into the CPU). Additional VoIP channels can be added with the VoIP Daughter Board (BE116500) & appropriate quantity of VoIP Channels for the system configuration
Maximum (112) SIP Stations (SL2100 & 3rd-Party) per system
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