LANCOM VoIP Routers: PBX Functionalities
Chapter 4: PBX functions in the LANCOM Business- VoIP- Router
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4 PBX functions in the LANCOM
Business-VoIP- Router
LANCOM Business-VoIP-Routers can provide small companies or subsidiaries
with all of the functions of a classical private branch exchange (PBX).
Telephony functions such as call hold, swap, connect or call transfer
(redirect calls)
Hunt group function with flexible call distribution and cascading of hunt
groups
Multiple logins to use various telephones under one telephone number
4.1
Call forwarding
Call forwarding means that a call that has already been placed is redirected
to a new destination either spontaneously by the user ("call transfer") or by
automatic call forwarding ("redirect call") as set up in advance. Call
forwarding with SIP-based VoIP telephony uses a different technology to that
used formerly, and yet the implementation of this function in the LANCOM
Business-VoIP-Router means that its operation is almost identical for all types
of terminal device.
Call charges for external call forwarding
The transfer of a call from an external caller to a third party who is also
external carries the risk that charges will arise for the ongoing call,
even though the initiating subscriber has ended the call.
When forwarding calls from external callers to another external
subscriber (e.g. when forwarding an office number to a mobile phone)
both of the ISDN lines are engaged when the external calls are
directed over a single ISDN line. If your device is connected to the
public telephone network via just two ISDN channels (one ISDN
interface), then no further calls can be made. Alternatively you can try
’Setting up call forwarding in the telephone exchange’
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