1.30 Networking Features
Feature Guide 381
1.30.6.1 PS Roaming by Network ICD Group
Description
One PS can be registered to up to 4 PBXs in a private network, and a Network ICD group created for the
PS at each PBX, with virtual PSs set to forward to the other PBXs in the network. When a call to the PS is
received at one of the PBXs, the call rings simultaneously at all PBXs in the network to which that PS is
registered.
Each virtual PS is set to forward calls to the extension number of the actual PS as registered at one of the
other PBXs.
Then, an Incoming Call Distribution (ICD) Group is created containing the registered PS and the virtual PSs.
When a call is received at one of the PBXs, it is forwarded to all of the other PBXs. One private network
channel is used to forward an incoming call to one other PBX. Therefore, if a PS is registered at 3 other
PBXs, 3 private network channels are needed to forward a single call to all of the PBXs.
Each PBX can store the current communication status of each PS (In Range or Out of Range). If the status
of the PS is set to Out of Range when a call is received, the call will be refused and the private network
channel will be released immediately. Since the PS can only be set to In Range at a single PBX at one time,
any other PBXs to which the call is transferred will refuse the call, releasing the VoIP or ISDN channels.
Conditions
• Hardware Requirement
The KX-TDA6920, KX-TDA0920 or KX-TDA3920 SD Memory Card for Software Upgrade to Enhanced
Version
• If no signal is received from a PS for the preprogrammed length of time when an incoming call is
received, the communication status of the PS is set to Out of Range, if enabled through system
programming.
PBX-1
Private network
PBX-2
Telephone Company
Virtual PS3
Virtual PS2
Virtual PS1
PBX-3
PBX-4
ICD Group
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