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Snom 870

You do not need to dial any numerical prefix before dialing an extension or external number. Simply dial the extension or 10 digit number.

Call Forwarding

1. Press .

2. Tap Call Features > Call Forwarding.

3. Enable the desired forwarding type.

  • All: Forwards all incoming calls.
  • Timeout: Forwards all unanswered incoming calls (in seconds).
  • Busy: Forwards calls that arrive when you’re already in a call.

4. Enter the internal extension or external number to which calls will be forwarded (Target when Forwarding).

5. If you selected Timeout, enter how many rings to wait before forwarding.

6. Press  to enable (to disable call forwarding, change Enable Forwarding to No).

Do Not Disturb (DND)

Enabling DND stops your phone from ringing and sends all incoming calls directly to voicemail.  Calls are logged in your Missed Calls.

1. Press  to enable/disable.

Voicemail Access

1. Dial .

2. Dial your password (default 0000).

Speed Dial

1. Select SettingsPreferences > Fkeys.

2. Enter extension or 10 digit phone number.

3. Press .

3-Way Calls

1. Press  to place the current call on hold.

2. Dial the internal extension or external number to add to the conference.

3. Press  and wait for the second party to answer, and then let them know that you would like to add them to a 3-way call.

4. Place the second call on hold and then drag both calls into the “Setup a Conference” rows.

5. Tap .

Warm Transfer

Places a current call on hold and allows you to speak with the other party before transferring the call to them.

1. Press  to place the current call on hold.

2. Dial the internal extension or external number.

3. Press  to speak with the destination party.

4. Press  twice.

5. Hang up.

Blind Transfer

A blind transfer routes a call to another party without speaking to them first.

1. While on an active call, press .

2. Dial the internal extension or external number.

Tip: To transfer a call directly to voicemail, dial 0 + extension.


1. Press .

2. Tap the Line key to retrieve the call.

Modify Ringtone

1. Press .

2. Tap Preferences > Ringer.

3. If there are multiple lines assigned to the device, select the line you wish to modify.

4. Tap the desired ringtone (tap to sample ringtones).

5. Press .

Note: This device supports silent ringtones.

Presence Monitoring

In order to presence monitor, you must have the feature enabled on your device by an administrator. If not enabled, contact your system administrator for assistance.

Note: The lines that you wish to monitor must be speed dial assignments on your phone.

*Softkeys are buttons located around the display whose function changes depending on the context. These keys are managed by your system administrator.

See a feature you don’t understand? See our phone feature glossary.

Call Handling Features

  • Warm Transfer
  • Blind Transfer
  • Do Not Disturb (DND)
  • Call Forward All
  • Call Forward Busy
  • Call Forward No Answer
  • Intercom (* + ext)
  • Hold
  • Reject
  • Multi-way Calling
  • Anonymous Call Rejection
  • Call Waiting
  • On-hook Dialing
  • Speakerphone

User Interface Features

  • Call Logs
  • LDAP Directory
  • On Device Directory
  • Adjustable Ringer Volume
  • Electronic Hook Switch (EHS)
  • Bluetooth

Feature Keys

  • 12 SIP Accounts
  • 15 Virtual Upper Multifunction Keys*
  • Mute Button

*Supports line assignments.

  • Voicemail Button
  • On Device Speed Dial Edit


  • Color Display
  • Message Waiting Indicator (MWI)
  • Busy Lamp Field (BLF)
  • Caller ID (CID)
  • Time/Date Display
  • On-Screen Message Display

Network & Provisioning

  • On Device Ethernet (PoE)
  • PC Connection
  • Cisco Multicast
  • Web Interface Provisionable


  • Wired Headset

Please contact Customer Support to provision this device.

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