Device Type: IP Desk Phone (Enterprise / 3PCC Multiplatform)
Model / SKU: Cisco CP-7841 (also CP-7841-K9, CP-7841-3PCC-K9)
Display: 3.5-inch (89 mm) Monochrome LCD, 396 × 162 pixels, White Backlight
Line Keys: 4 Programmable Line Keys
Audio: Wideband Audio (G.722) on Handset, Speakerphone, and Headset; Full-Duplex Speakerphone
Network Interface: Integrated Gigabit Ethernet Switch (10/100/1000), 2 Ports (LAN + PC Passthrough)
Power: IEEE 802.3af Power over Ethernet (PoE) Class 1; Optional 48V DC Power Adapter (sold separately)
Signaling Protocol: SIP (3PCC version supports third-party call control platforms like BroadSoft, Microsoft Lync)
Headset Port: Dedicated RJ-9 Headset Port with Electronic Hook Switch (EHS) support (AUX only)
Codecs: G.711a/μ, G.722, G.729a/b/ab, iLBC
Wall Mountable: Yes (requires optional wall mount kit)
Key Specs: Cisco CP-7841 IP Phone, 4-Line SIP/SCCP, 3.5" Monochrome LCD (396×162), Gigabit Ethernet Switch, PoE 802.3af, Wideband HD Audio (G.722), Full-Duplex Speakerphone, Headset Port with EHS, 3PCC Multiplatform Variant Available
Usage: Enterprise desk phone for knowledge workers and busy call environments requiring Gigabit throughput for PC passthrough. The standard CP-7841-K9 integrates with Cisco Unified Communications Manager (CUCM) for on-premises or hosted deployments. The 3PCC variant (CP-7841-3PCC-K9) is designed for third-party SIP platforms (BroadSoft, Microsoft Lync, and other open SIP deployments) .
