Cisco Phone Manual 8851

The Cisco IP Phone 8851 is a high-quality, feature-rich VoIP desk phone designed for business environments. It supports high-definition voice, multiple lines, and integrates seamlessly with Cisco Unified Communications Manager. Key features include a high-resolution color display, built-in Gigabit Ethernet switch, support for Power over Ethernet (PoE), and a wide range of telephony features like call hold, transfer, conference, and voicemail access. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: High-resolution color display, Handset with HD voice, Speakerphone, Navigation cluster, Softkeys, Volume rocker, Ethernet ports, Headset port.

Installation

Unpack and inspect contents. Place on stable desk surface.

1. Connect to Network: Use Ethernet cable to connect the LAN port to your network switch.
2. Connect PC (Optional): Use second Ethernet cable from PC port to your computer.
3. Power the Phone: Use PoE from switch or connect the external power adapter.
4. Connect Handset: Plug the handset cord into the dedicated jack.
5. Connect Headset (Optional): Plug wired headset into the 3.5mm headset port.

WARNING! Use only approved power sources. Ensure cables are not pinched or damaged.

First-Time Setup

Phone will boot and register with Cisco Unified Communications Manager (CUCM).

1. Network Registration: Phone obtains IP address via DHCP and contacts CUCM.
2. Extension Assignment: Your administrator will assign a directory number (extension).
3. Configure Preferences: Use the Settings menu to set language, time, ringtone, etc.
4. Test Call: Make a test call to verify audio quality and functionality.

CAUTION! Do not unplug during boot process. Contact your system administrator for configuration.

Specifications

• Model: Cisco IP Phone 8851.
• Display: 3.5-inch grayscale or color LCD (model dependent).
• Audio Codecs: G.711, G.729, G.722 (wideband).
• Network: Dual 10/100/1000 Ethernet ports, 802.3af PoE.
• Protocols: SIP (Session Initiation Protocol) or SCCP (Skinny).
• Features: Hold, Transfer, Conference, Forward, Voicemail, Presence.
• Power Source: 802.3af PoE (Class 2) or 48V DC power adapter.
• Operating Temp: 32°F to 104°F (0°C to 40°C).
• Compliance: FCC Part 15, UL, CE.

Controls and Settings

Access menus via the Navigation button. Front Buttons: Speakerphone, Mute, Headset, Volume, Navigation cluster, Softkeys.

Softkey Functions: Call Hold, Transfer, Conference, More (for additional options).

Settings Menu: Navigate to Settings > Preferences to adjust: - Ringtone: Select from available tones. - Display: Contrast, backlight timeout. - Audio: Handset, speaker, ringer volume levels. - Network: View IP address, network status (admin only). - Time & Date: Set format, time zone (often server-provided).

Connecting Devices

Network: LAN port to switch. PC: PC port to computer. Headset: 3.5mm jack.

1. Ensure phone is powered off before connecting cables.
2. Use standard CAT5e or higher Ethernet cables.
3. For PoE, verify switch provides 802.3af power.
4. For headset, use Cisco-approved models for best compatibility.

Tip: Label cables for easy identification during maintenance.

Advanced Call Features

Supports standard and advanced telephony features.

1. Make Call: Lift handset or press Speakerphone, dial number.
2. Answer Call: Lift handset, press Speakerphone, or press Answer softkey.
3. Hold: Press Hold softkey to place call on hold.
4. Transfer: During call, press Transfer, dial target number, press Transfer again.
5. Conference: During call, press Conference, dial third party, press Conference again to merge.
6. Forward Calls: Use Call Forward All softkey or menu to set forwarding destination.
7. Voicemail: Press Messages button or dial voicemail access number.
8. Redial: Press Redial softkey to call last dialed number.

WARNING! Do not use liquid cleaners on buttons or display. Use soft, dry cloth.

Accessibility Features

High-Contrast Display: Adjust in settings for better visibility. Audio Adjustments: Independent volume controls for handset, speaker, ringer. TTY Support: Can be configured for Teletypewriter compatibility (requires adapter and service).

Care & Cleaning

Disconnect power before cleaning. Use slightly damp, lint-free cloth for display and housing. Do not use abrasive cleaners or sprays.

CAUTION! Avoid moisture entering ports or openings. Never submerge any part of the phone.

Regulatory Information

FCC Part 15: Class A digital device; complies with limits for business use. This device may not cause harmful interference and must accept any interference received. Copyright © Cisco Systems, Inc. All rights reserved. For technical support, contact your system administrator or visit www.cisco.com/go/phones. Cisco One-Year Limited Hardware Warranty applies.

Troubleshooting

Reset: Settings > Admin Settings > Reset Settings (may require admin password).

Service: Contact your IT administrator or Cisco Technical Support.