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5420, 5621, 2420, 4621, 4625 Telephones

These telephones are best suited for the Executive User and with the optional EU24 Button Module good for the Receptionist/Assistant User.



Works on IP Office

Works on IP Office and

Communication Manager




5621 SW






4621 SW



4625 SW



Note that 4621 and 4625, while supported on IP Office R6  are not longer available for new sales.

Common Features:

Display: 7 lines x 29 characters.
Fixed Feature Buttons: 10 - Conference, Headset, Transfer, Drop, Redial, Speaker, Hold, Mute, Volume Up, Volume Down.
Programmable Feature Buttons:
DS Phones: 24 - arranged in 3 switchable display pages of 8 matching the 8 physical display buttons.
IP Phones: 24 - arranged in 2 switchable display pages of 12 matching the 12 physical display buttons.
Key Labels: Icons and text used on fixed feature keys.
Speakerphone: Two-way handsfree speaker and microphone.
Hearing Aid Compatible: Yes.
Message Waiting Indicator: Yes - can also be used as a ringing call alert indicator.
Personalized Ring Patterns: Yes - 8.
Headset Socket: Yes.
Embedded Applications: Speed Dial List (104) and Call Log (Missed, Incoming, Outgoing). Also WAP WML browser supported on IP phone models.
Upgradeable Firmware: Yes.
Expansion: Supports the EU24 DSS expansion module (with additional Avaya 1151 power supply).
Color: Multi-gray.
Mounting: Desk or wall mountable.
Adjustable Desk Stand: Yes - Supplied with phone.

Special Features for the 5420 and 2420:

Messages Button: Dedicated button to collect voicemail.

Requirements for 5420 and 2420:

Connect to: Digital Station (DS) port.
Power Supply: From phone system.

Requirements for 5621 SW, 4621 SW, 4625 SW:

Power Supply: IEEE 802.3af Power over Ethernet (PoE) or individual power supply unit (Avaya 1151 series).
Codecs: G.711, G.729a/b.
QoS Options: UDP Port Selection, DiffServ and 802.1p/q (VLAN)
SNMP Support: Yes.
IP Address Assignment: Static or dynamic IP address assignment.
Ethernet Ports: Two port full-duplex 10/100 BaseT Ethernet switch for PC pass-through connection.
Auto-negotiation provided separately for each port.
802.3 Flow Control.
Phone has priority over PC port at all times.

Special Features for 5621 SW and 4621 SW:

Display Backlight: The display has a backlight for improved contrast. Standby mode turns off backlight after time-out.

Special Features for 4625 SW:

Color Backlight Display: The display is full color and has a backlight for improved contrast.

Note: While still supported, the 5620SW and 4620SW phones are no longer available for purchase.

© 2010 AVAYA
15-601041 Issue 20.f.-
18:14, 25 February 2010

Performance figures, data and operation quoted in this document are typical and must be specifically confirmed in writing by Avaya before they become applicable to any particular order or contract. The company reserves the right to make alterations or amendments at its own discretion. The publication of information in this document does not imply freedom from patent or any other protective rights of Avaya or others.

All trademarks identified by (R) or TM are registered trademarks or trademarks respectively of Avaya Inc. All other trademarks are the property of their respective owners.

Last Modified: 22/12/2009