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CASE 9: Integrating IP PBX with Legacy PBX for
SMB Office
SP5325/4S
IP PBX SMB
Legacy PBX
PSTN/GSM
PSTN/GSM
4*FXS
SMB Office
…
SP5103 SP5004/S
ISP/ITSP
Internet
ISP/ITSP
Telephone
Telephone
…
Scale: 50 - 100 users (or more)
Extension:
Legacy PBX has control of extension calling as before.
Expansion of the Scale and the Functionality (VoIP): SP5325 uses FXS
ports to connect legacy PBX for expansion, and has control of extension
calling among the legacy telephones and the registered VoIP devices
(SP5103, SP5004/S, etc).
SIP Trunk: SP5325 registers to ISP/ITSP for inbound/outbound SIP calls.
@London
@Paris
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