MicroNet SP5001C Manual do Utilizador descarregar pdf (Página 26)

CASE 7: IP PBX for SMB Office

SP5325/1S3O

IP PBX SMB

3*FXO

…

SMB Office

PSTN/GSM

ISP/ITSP

Internet

 Scale: 50 - 70 users

 Extension: SP5325 controls SIP calls among the registered devices SP5103

and SP5004/S (or other FXS gateway).

 SIP Trunk: SP5325 registers to ISP/ITSP for inbound/outbound SIP calls.

 PSTN Trunk (FXO): Company needs a representative PSTN number for

customers to call. If the direct calling with PSTN number to VoIP network is not

supported by ITSP, FXO ports connect with PSTN lines and allow daily phone

calls from/to PSTN/GSM.

 PSTN Backup: SP5325 supports PSTN lifeline on FXS/FXO model. In case of

power failure, users can still make/receive calls via PSTN lines.

SP5103

SIP Phone

SP5004/S

VoIP FXS Gateway

1*FXS

@London

@Paris

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MicroNet SP5001C Manual do Utilizador Página 26