A-Phone Specifications & Features

Owned by Merry Arpaia
Oct 07, 2024
2 min read

The table below details several features and specifications of the A-Series IP Phones.
Please also review the A-Series IP Phones Datasheet for additional detail.

You may also wish to visit the A-Series Phones for Asterisk Product Page or our A-Phones Overview support article for links to related resources.

 

 

A20

Entry-level

A22

Entry-level gigabit

A25

Mid-level gigabit

A30

Executive-level gigabit

Line Registrations

2

2

4

6

Feature Keys

1

1

5

7

Rapid Dial/BLF

1 key
1 contact

1 key
1 contact

6 keys
30 contacts

10 keys
45 contacts

Ethernet LAN and PC port

10/100 BASE-T

10/100/1000 BASE-T

10/100/1000 BASE-T

10/100/1000 BASE-T

Display

2.8” color

2.8” color

Main: 2.8” color

BLF: 2.4” color

4.3” color

Power over Ethernet (PoE)

Yes

Yes

Yes

Yes

Electronic Hookswitch Support

Yes

Yes

Yes

Yes

Context-Sensitive Soft Keys

4

4

4

4

Navigation Controller

5-way

5-way

5-way

5-way

Additional Buttons

Headset, speaker, and mute keys
Volume control

Headset, speaker, and mute keys
Volume control

Headset, speaker, and mute keys
Volume control

Headset, speaker, and mute keys
Volume control

LED Message-Waiting Indicator

Yes

Yes

Yes

Yes

Connections

  • 4P4C (RJ-9) handset jack

  • 4P4C (RJ-9) headset jack

  • 2 switched 10/100 Mbps Ethernet ports

  • 5-volt DC power port

  • 4P4C (RJ-9) handset jack

  • 4P4C (RJ-9) headset jack

  • 2 switched 10/100/1000 Mbps Ethernet ports

  • 5-volt DC power port

  • 4P4C (RJ-9) handset jack

  • 4P4C (RJ-9) headset jack

  • 2 switched 10/100/1000 Mbps Ethernet ports

  • 5-volt DC power port

  • 4P4C (RJ-9) handset jack

  • 4P4C (RJ-9) headset jack

  • 2 switched 10/100/1000 Mbps Ethernet ports

  • 12-volt DC power port

 

Phone Features

  • Auto-answer

  • Headset-answer

  • Headset-ring

  • Distinctive ring

  • Call waiting

  • Call transfer (blind & attended)

  • Call forward

  • Call hold

  • Intercom / Paging

  • Message Waiting Indication (MWI)

  • Busy Lamp Field (BLF)

  • 3-way conferencing

  • Do Not Disturb (DND)

  • Redial

  • Call timer

  • Caller ID display

 

SIP / VoIP Support

  • SIP v2

  • SDES Secure RTP

  • DTMF, RFC2833

  • SIP peer-to-peer

  • SIP presence (Subscribe/Notify)

  • Per-account digit map/dial plan

  • Dial using SIP server

  • Secure SIP authentication

 

Provisioning

  • DHCP Option 66

  • XML Configuration

  • Phone GUI

  • Phone UI

 

Management

  • Digest authentication login to phone web UI

  • Firmware update via browser

  • Factory restore via GUI

  • Remote logging via Syslog

 

Audio Features

  • Handset, speaker, and headset modes

  • Full-duplex HD speakerphone with echo cancellation

  • Hearing aid compatible

  • Wideband: G.722 on all models. The A30 also supports Opus.

  • Narrowband: G.711 ulaw/alaw, G.726 and G.729a on all models. The A30 also supports iLBC.

  • Background noise suppression

  • Multicast audio playback 

 

Network Support

  • Static or DHCP IP address assignment

  • NTP time synchronization

  • Priority queueing

  • Manual and LLDP-assigned VLAN

  • NAT traversal 

  • QoS

  • 802.1X authentication
     

Language Support

  • Dutch  (A20/22/25 only)

  • English

  • French

  • German

  • Italian

  • Portuguese  (A20/22/25 only)

  • Russian

  • Spanish

 

 

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