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3c. Cisco IP Phone 7960/40 Administrator Guide for SIP, Version 4.0 - Product Overview (Version 4.0) [Cisco SIP IP Phone Software] - Cisco
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6. Cisco IP Phone 7960 Administrator Guide for SIP, Version 1.0 - Product Overview (Version 1.0) [Cisco SIP IP Phone Software] - Cisco
Polycom VVX410 VoIP/SIP Phone, 12 Line, 2-Ports, PoE
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Fanvil Ip Phone X7 Android Video 6 Sip Lines With Touchscreen Dual Gigabit Ports Poe - Voip Products - AliExpress
