Technical specifications, Connectivity, Audio

Konftel 250 manual Technical specifications, Connectivity, Audio, Environment, Approvals

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	Technical specifications
Size	Diameter 240 mm, height 77 mm
Weight	1 kg
Colour	Charcoal black
Display screen	Illuminated graphics (LCD), 128x64
Keypad	Alphanumerical 0–9, *, off hook/F, on hook, mute, hold,
	volume up, volume down, 5 buttons for menu navigation,
	phone book, conference guide
Anti-theft protection	Kensington security slot
Memory	Support for SD memory cards up to 2 GB

Connectivity

Analogue telephone connectivity

	Modular 6/6 modular (RJ11) to a public analogue telecom-
	munication network or an analogue PBX
Power supply	AC adapter 100–240 V AC/14 V DC
Expansion microphones	2 modular 4/4

Audio

Technology	OmniSound® 2.0
Microphone	Omni-directional
Reception area	Up to 30 metres2, >10 people
Speakers	Frequency band 200–3300 Hz
Sound level	90 dB SPL 0.5 m
Equalizer	Three pitches: soft, neutral, bright

Environment

Temperature	5°–40°C
Relative humidity	20-80% condensation free
Recommended acoustic conditions
	Reverberation period: 0.5 S Rt 60
	Background noise: 45 dBA

Approvals

Telecommunication	TBR21, 47 CFR Part 68/TIA, IC CS-03 Issue 1999/01/01
EMC	EN301 489-1,3. EN 300 220-1,2, FCC subparts B and C
Electrical safety	UL 60950-1, EN 60950-1:2001

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Contents

Konftel 250 User Guide Page Table of contents Description MaintenanceGeneral Description Writing text KeypadWriting style in instructions Navigation and selection in menusMenu tree Connections Connecting and installingUnpacking Select region and languageAnswering calls Answering and making callsEnding calls Making callsAnswering and making calls If you don’t get an answer when you dial the second numberMaking three-way calls  Go back to the first call by pressing FDuring a call Adjusting the speaker volumePlacing calls on temporary hold MuteCreating conference groups Conference guideMaking conference group calls Entering text with the keypadMaking multi-party calls Conference guideDisplaying conference group participants Editing conference groupsIf you experience problems making multi-party calls Conference guide settingsDeleting conference groups Delete all conference groupsSearching for contacts PhonebookAdding contacts Editing contactsDeleting contacts PhonebookDeleting all conference groups Displaying phonebook statusStarting a recording RecordingMute function HoldListening to a recording RecordingDisplaying recording feature status Adjusting the recording indicatorManaging recordings Adjusting date and time SettingsSelecting languages Select regionAdjusting the flash/R pulse duration Adjusting ring level volumeSelecting Caller ID standard Settings Optional accessories Troubleshooting Connectivity Technical specificationsAudio EnvironmentGuarantee Service and guaranteeService We give a two-year guarantee on our conference telephones

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Konftel 250 manual Technical specifications, Connectivity, Audio, Environment, Approvals

Technical specifications

Connectivity

Audio

Environment

Approvals