Key features
• Large 2.4" color display
• Support Shared Call Emulation (SCE)
• 6 programmable LED function keys
• Wireless software updates for handsets (OTA)
• Belt clip
BASICS
Product information
• DECT handset M55|Charging cradle
• Colour: black
• Anti-bacterial housing
Placement: indoor, desktop
DIMENSIONS AND WEIGHT
Dimensions (L x W x D, approx.)
• 188 mm × 55 mm × 35 mm
Weight (approx.)
• Handset & Battery & belt clip: 188 g
DISPLAY AND INDICATORS
Display
• TFT liquid crystal display (LCD), highcolour, backlit
• Size (diagonal): 2.4″ (61 mm)
• Resolution: 240 × 320 pixel
9 LED indicators
• Notification of missed calls|Message waiting indication (MWI): 1 red LED
• Function key status indication: 6 dual-colour LEDs (red / green)
• Audio key status indication: 1 red LED
• Charging indication: 1 red LED on the charging cradle
KEYPAD AND FUNCTION KEYS
31 hard keys in total
• 12 keys (standard ITU telephone keypad), backlit
• 5-way navigation key
• 3 context-sensitive function keys
• 6 programmable function keys (with dual-colour LED)
• 3 dedicated audio keys
• Speakerphone (with red LED)
• Volume + / - (rocker)
• 2 dedicated function keys
• Offhook
• Multicast paging
Keyboard lock
INTERFACES AND CONNECTIONS
Power options
• Handset
• Battery 3.7 V, 1,500 mAh, 5.55 W, lithium-ion, rechargeable, up to 240 h standby time, up to 19 h narrowband talk time, up to 12 h wideband talk time
• Charging cradle
• Power adapter: 100 - 240 V AC / 50 - 60 Hz / 300 mA | 5 V DC / 2 A
• USB powering via USB-A port/cable
Wired interfaces
• Headset: 3.5 mm miniature audio jack
Wireless interfaces
• DECT3
• Headset (Bluetooth): Bluetooth
AUDIO FEATURES
Handset
• Hearing aid compatible (HAC)
USER INTERFACES AND SETUPConfiguration and setup via menu-driven phone user interface (PUI)
• Languages: English, French, Italian, Spanish, German, Dutch, Greek, Russian.
Localization
• Time zone, dial tone
DIRECTORY SUPPORT AND CALL FEATURES
Directory support
• Local directory with up to 200 entries
• LDAP (server-based directory)¹
• Central directory on the base station with up to 500 shared entries¹
• XML phonebook support¹
Outgoing call features
• Speed dialling
• Redial (via dialed calls list)
• Caller identification (CLIP)
• Intercom¹
• Multicast paging¹
Incoming call features
• Call waiting/swapping
• Auto answer
• Call diversion
Connected call features
• Hold
• Blind call transfer
• Attended call transfer
• 2+1 local conferencing
• Call barging¹
• Call park / unpark¹
Related features
• Call history lists
• Shared Call Emulation²
• Extension monitoring (Busy lamp field), call pickup¹
• Paging zones¹
• Intercom groups¹
DECT TECHNOLOGY AND FEATURES
Standard: DECT³
• Authentication/encryption of base and handset
• Seamless handover
• Wideband audio
Frequency band
• Europe: 1,880 - 1,900 MHz
• Americas 1,920 - 1,930 MHz
Output power
• Europe: < 250 mW
• Americas: < 100 mW
Coverage
• Up to 50 m indoor range
• Up to 300 m outdoor range
Related features
• Software upgrade over the air (SUOTA)
• Auto registration when not registered
• Date and time synchronization from base station
NETWORK TECHNOLOGIES
Bluetooth
• Headset Profile (HSP)
• Wireless range (approx.): 10 m
ENVIRONMENTAL CONDITIONS
Operating ambient temperature
• 0 °C - +40 °C
¹
Function only available when paired to the M500
²Shared Call Emulation: Snom's unique PBX feature emulation for line, hold/unhold and call pick-up
³DECT devices manufactured for the USA and Canada are marketed as DECT 6.0