Cisco CP 6921 User Manual

The Cisco CP 6921 is a business-class IP phone featuring a high-resolution grayscale display, support for up to 2 SIP lines, Power over Ethernet (PoE), integrated Gigabit Ethernet switch, full-duplex speakerphone, headset support, and programmable line/feature keys. Designed for reliable voice communication in enterprise environments with advanced call handling features. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Advanced Call Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Grayscale display, handset, keypad, programmable line keys, speakerphone, Ethernet ports.

Feature	Description
Display	High-resolution grayscale LCD with backlight
Line Support	Up to 2 SIP lines
Network	Integrated 10/100/1000 Ethernet switch with PoE support
Audio	Full-duplex speakerphone, wideband audio support
Headset Port	RJ-9 headset connector for hands-free operation
Programmable Keys	4 line/feature keys for speed dial, call functions
Message Waiting Indicator	LED for visual voicemail notification
Volume Control	Dedicated buttons for handset, speaker, ringer volume
Power	802.3af PoE or optional power adapter
Security	Secure boot, encrypted configuration files

Installation

Unpack and inspect contents. Place on stable surface.

Connect to network: Use Ethernet cable to connect LAN port to switch.
Power connection: Use PoE from switch or connect optional power adapter.
Connect handset: Plug handset cord into dedicated port.
Optional headset: Connect to RJ-9 headset port.

WARNING! Use only approved power sources. Ensure proper ventilation around device.

First-Time Setup

Power on phone; follow initialization process.

Network configuration: Phone obtains IP via DHCP by default.
Provisioning: Contact administrator for SIP server configuration.
Basic settings: Set language, time zone, and ring tone via settings menu.
Line registration: Enter SIP credentials provided by administrator.

CAUTION! Do not expose to liquids or extreme temperatures.

Specifications

Display: 3.5-inch grayscale LCD with backlight.
Network Interface: 10/100/1000 Ethernet with PoE (802.3af).
Protocol Support: SIP (Session Initiation Protocol).
Audio Codecs: G.711, G.729, G.722, iLBC.
Power Requirements: 802.3af PoE or 12V DC power adapter.
Operating Temperature: 32°F to 104°F (0°C to 40°C).
Dimensions: 8.3 x 10.2 x 6.5 inches (210 x 260 x 165 mm).
Weight: 3.3 lbs (1.5 kg).
Compliance: FCC Part 15, UL, CE, RoHS.

Controls and Settings

Access settings via phone menu or web interface. Front Panel: Navigation pad, soft keys, volume controls, speakerphone button.

Key Functions: Hold, Transfer, Conference, Messages, Directory, Settings, Mute, Headset.

Phone Settings: Language, time/date, ring tones, display contrast, network configuration. Audio Settings: Speaker volume, handset volume, ringer volume, audio mode. Network Settings: IP configuration, VLAN, QoS, SIP server settings. Programmable Keys: Configure for speed dial, line appearances, or features.

Connecting Devices

Network: Ethernet cable to switch port. Accessories: Handset, headset, optional expansion module.

Turn off power before connecting accessories.
Connect handset to dedicated port on left side.
Connect headset to RJ-9 port if needed.
Connect PC to PC port for pass-through networking.

Tip: Use Cat5e or better Ethernet cables for optimal performance.

Advanced Call Features

Supports standard and advanced telephony features.

Make call: Lift handset or press speakerphone, dial number.
Answer call: Lift handset, press speakerphone, or press Answer soft key.
Hold: Press Hold button to place call on hold.
Transfer: During call, press Transfer, dial target, press Transfer again.
Conference: During call, press Conference, dial participant, press Conference again.
Forward calls: Configure via call forwarding settings.
Voicemail: Press Messages button to access voicemail.
Directory: Access corporate directory or personal contacts.

WARNING! Do not use damaged handset cords. Replace if frayed or damaged.

Accessibility Features

Visual Alerts: Flashing message waiting indicator. Audio Adjustments: Adjustable ringer volume and tone. TTY Support: Compatible with teletype devices when configured.

Care & Cleaning

Unplug before cleaning. Use slightly damp cloth; avoid liquids entering device.

CAUTION! Do not use abrasive cleaners or solvents. Keep away from heat sources.

Regulatory Information

FCC Part 15: Class A digital device; complies with limits for commercial environments. Copyright © Cisco Systems, Inc. All rights reserved. For support, visit www.cisco.com or contact Cisco Technical Assistance Center. This product may be covered by one or more patents.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	PoE/Power adapter	Check Ethernet cable/PoE switch; verify power adapter connection.
No network connectivity	Cable/DHCP	Check Ethernet cable; verify DHCP server availability.
No dial tone	Registration/SIP	Verify SIP credentials; check network connectivity to SIP server.
Poor audio quality	Network/QoS	Check network congestion; verify QoS settings on switch.
Display issues	Power/contrast	Adjust display contrast in settings; reboot phone.

Reset: Press and hold # key during boot for factory reset.

Service: Contact Cisco TAC or authorized service provider.