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The ADTRAN® IP 321 is a two-line SIP phone delivering superb sound quality as well as a wide range of supported business telephony features. The ADTRAN IP 321 phone has a single 10/100 Ethernet port and is designed for common areas, such as lobbies, hallways, and break rooms, as well as various wall-mounted deployments.


Features of the phone include:

  • 18 dedicated feature keys (of which there are 2 line keys, 3 soft keys)
  • Full-duplex speakerphone
  • Support for G.711 and G.729 codecs
  • RJ-22 headset jack
  • Includes auto-sensing 802.3af PoE support 
  • Base stand doubles as a wall mount bracket
  • Does not include Power supply

Features and Benefits

Excellent Sound Quality
Acoustic Clarity Technology enables crystal-clear simultaneous hands-free conversations as natural as being there.

Enterprise-Grade Feature Set
Two lines, support of shared line presence, 3-way local conferencing, and built-in XML microbrowser.

Efficient Installation and Provisioning
User friendly design and menu options for simplified deployments.

Broad and Robust Interoperability
While designed to work with ADTRAN’s Unified Communications suite of products, these phones are certified to interoperate with a broad array of SIP call control platforms to enable open choices and innovations while simplifying provisioning, management and support.

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