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M58 DECT Desk Phone

The M58 Desk Phone is one of two devices that pair to the M500 Pro DECT Multicell Base Station. This family of devices will streamline your internal and external communications. The M58 does not need an ethernet connection. This gives you the flexibility to place the desk phone anywhere within your workplace.

The desk phone has a large 5” (480 x 272) color LCD display and 24 self-labeling programmable keys (8 physical) with designated next page button, providing an easy user-friendly experience. The dimensions of the M58 are roughly 175mm x 240mm x 210mm with desk stand.

Audio keys with LED indication for Mute, Speakerphone, Headset and Volume. Other dedicated keys included for Message, Directory, Redial, Call History, settings, Intercom and Hold. Built-in Bluetooth® connectivity, with audio quality fine-tuned for maximum voice clarity and background noise reduction. Background noise reduction allows you to take calls in busy work environments without disruption to your calls.

The unique one button paging feature allows you to broadcast a message to all devices on the network, communicating with all team members at once. When someone wants to respond to your page, they can page back or call your line directly. All M58 desk phones and M55 handset devices have visibility to what lines are busy, on hold, and when incoming calls need your attention. Never miss a call and maintain clear communication within your team.

Phone Functions with Compatible Base Stations

Programmable Keys

  • Line key
  • KeyLine1
  • Speed dial
  • Busy phone monitoring2
  • Paging zones
  • Directory
  • Additional functions in current and future software

Shared Calls

  • All shared calls are visible and can be managed on all devices (up to 16)
  • Phones are not limited to only 2 calls like traditional DECT devices

Other Features

  • Barge-in
  • Shared directory with up to 500 entries
  • Shared central directories: LDAP, remote XML
  • Private directory with up to 200 entries
  • Caller identification (CLIP)
  • Redial
  • Call waiting
  • Auto-answer (SIP and cradle pickup)
  • Call lists (all calls, missed, received, dial calls)
  • Hold (private or shared)
  • Blind and attended transfer
  • Call forwarding
  • 3-way conference
  • Missed call notification
  • MWI - Voice message waiting indicator


Frequency Bands

  • EU: 1880 - 1900 MHz
  • US: 1920 - 1930 MHz

Output Power

  • EU < 250mW
  • US < 100 mW


  • DECT 6.0

Other Features

  • Seamless handover and roaming
  • Wideband audio
  • Authentication/encryption of base and handset

User Interfaces

  • Display: 5" (480 x 272) color LCD
  • 8 self-labeling programmable keys with multi-color LEDs
  • Dedicated next page button to allow up to 24 function keys
  • 5-way navigation
  • Ok and Cancel keys
  • Dedicated keys for Message, Directory, Redial, Call History, settings, Intercom and Hold
  • Audio keys with LED indication for Mute, Speakerphone, Headset and Volume
  • Red LED for Call Indication / Message Waiting


Weight (Approximately)

  • 1051g (Phone + desk stand)

Dimensions (Approximately)

  • 175mm x 240mm x 210mm with desk stand


  • RJ9 for wired headset


  • Hearing-aid compatible (HAC)
  • Bluetooth for headset connection

Power Adapter

Input Power

  • 100-240 AC Volt, 50/60Hz, 150mA

Output Power

  • 5V 1A



  • up to 50 meters


  • up to 300 meters


  • Automatic registration to base via IPEI
  • Manual registration via menu or webui
  • Software Update: Over-the-air via base station
  • Date and time synchronization from base station

Product Number

  • 00004528

Compatible Base Station

  • Snom M500 SIP DECT Multicell Base Station: 00004525 (US)

  1. Refers to programmable key type that allows calls to be visible and accessible on different phones via key press. This is comparable to old key system operation.
  2. Refers to programmable key type that allows indication if a phone is busy in a call. This is comparable to SIP BLF operation.