Based on the Session Initiation Protocol (SIP) the Cisco SPA901 1-Line IP Phone has been tested to ensure comprehensive interoperability with equipment from voice over IP (VoIP) infrastructure leaders enabling service providers
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Developed for small businesses the Cisco SPA8800 IP Telephony Gateway adapts to the needs of businesses that maintain their own on-premise IP private branch exchange (PBX) or that want to add voice over IP (VoIP) to their legacy
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Network modules provide enterprises managed service providers and service providers with the ability to directly connect the public switched telephone network (PSTN) traditional telephony equipment such as private branch excha
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