In addition to the L400 the L420e has a display and more function keys.

SwyxPhone IP phones are connected to the local network over the Ethernet. The SwyxPhone product line includes the models L400, L420e, L420s and L440. In addition to the L400 the L420e and L420s have a display and more function keys. SwyxWare also supports the connection of Siemens IP phones.

Features

• "Do not disturb" function
• 12 function keys with status indication
• 2 keys for volume settings (plus/minus)
• 2x24 characters display: alphanumeric and tiltable
• 3 dialog keys for interactive user prompts
• Advice of Charge (AOC)
• Assistant configuration
• Automatic firmware update
• Automatic server recognition
• Blind Call Transfer
• Call hold
• Call pick-up
• Call swap
• Call transfer
• Call waiting indication
• Callback on busy, internal
• Callback on request
• Caller list with date and time
• Conference, user enabled
• Consultancy Call
• CTI/TAPI for SwyxPhone¹
• Delayed redirection
• Dialing by blockdialing
• Dialing by overlap sending
• Dialing of vanity numbers
• Fast configuration via DHCP
• Fixed redirection
• Global phone directory
• Group calls
• Group functions
• Group signaling
• Headset-ready
• Intercom
• List of calls and redials
• Mapping of project numbers to outgoing calls
• Mute Microphone
• Name dialing from phonebook
• Note function for phone numbers
• Open listening
• Password protection
• Personal phonebook
• Phone directory with user status
• Power over LAN (IEEE 802.3af)
• Redial list with date and time
• Redirection if absent
• Redirection if busy
• Redirection, remote configuration
• Roaming user profiles
• Selection of caller ID for outgoing calls
• Signaling of availability in phone book
• Signaling of availability on speed dials
• Signaling of new voicemails via display and function keys
• Speed Dial
• Supervised call transfer
• Supports "Quality of Service" functions: level 2 (802.1pQ) and level 3 (DiffServ)
• Suppression of own caller ID for external calls
• Time and date display
• Usage of Differentiated Services (DiffServ) in the Type of Service (TOS) field
• Voice encoding according to G.711 (64kbit/s)
• Voicemail check
• Voicemail, change announcements remote^{2, 3}
• Voicemail, remote inquiry²
• Wall-mountable

¹ In conjunction with SwyxWare option pack ² Requires IMAP4 capable mail server ³ Requires SMTP capable mail server