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SNOM 320 Datasheet



SNOM 320 - SIP Based VoIP Telephone


SNOM 320 SIP Based VoIP Telephone

Ideal for the office and everyone who spends a lot of time on the phone, the snom 320 is an affordable, yet powerful SIP business phone with built-in, full-duplex speakerphone and three-party conference bridging.

Display and Keys
A 2 x 24 semi-graphic LCD display and menu-driven user interface support an uncomplicated feature management.

12 programmable keys with LEDs support quick access to important extensions. Call list and address book can contain up to 100 entries each, and entries can be added and changed easily.

Main Features

  • two-line display with graphical field
  • 47 keys, 13 LEDs
  • 12 programmable function keys
  • Speakerphone
  • Dual Ethernet connection
  • Power over Ethernet
  • Headset connection
  • SIP RFC3261
  • Security: SIPS/SRTP, TLS
  • Codecs: G.711, G.729A, G.723.1, G.722, G.726, GSM 6.10 (Full rate)
  • National Language Support
  • very low energy consumption
  • For further features please consult the data sheet below
  • available colours: black

Other features like blocking anonymous calls, downloading ringtones, auto-answer mode, DND mode, and other features are only examples from an abundance of functions which make phone use convenient and comfortable while increasing productivity. Additional applications like CTI further enhance the functionality.

Installing the snom 320 is child's play and possible on the phone itself as well as by remote configuration. Further advantages are extensive Codec support and wide-ranging compatibility with SIP components made by other manufacturers.

The support of STUN, NAT, ENUM, and numerous other functions allows flexible utilization behind local proxies, IP PBXs, and hosted VoIP services.

Concerning security, the snom 320 protects you with SRTP and TLS against wiretapping and unwanted access to signaling and authentication data.

Three way conference
The snom 320's built-in three-way conference bridge eliminates external devices and services while offering high audio quality and minimal latency. These savings together with the snom 320's very low energy consumption (1.0 to 1.5 w-hrs in standby) and PoE (Power over Ethernet) truly help to lower your costs.

Product Specifications

  • Network: RJ45 (Ethernet)
  • PC: RJ45 (Ethernet)
  • Power: 5 V DC (stabilized)
  • 2 port switch included (802.3 10/100 BT half duplex/full duplex with autosense)
  • Power over LAN (IEEE 802.3af) on network port
  • Headset: RJ-Connector Headset

User Interface
  • Display: 2 x 24 character display
  • 47 keys, 13 LEDs
  • Last calls (100 entries)
  • Address book (100 entries)
  • Address book Import/Export
  • Number guessing, speed dialing
  • Missed calls, dialed calls
  • Call waiting indication
  • Clock, daylight saving, call-timer
  • Call blocking (Deny List)
  • Programmable function keys
  • Menu-driven user interface
  • Selectable ringing melodies
  • National language support for selected languages (NLS)
  • Asian language support (ALS)
  • Downloadable ringing melodies
  • URL Dialing support
  • Do not disturb
  • Speakerphone (Full Duplex)
  • Auto answer mode
  • UTF8-encoded Caller-ID (ALS)
  • Multi-Line registration

Call Features
  • Hold
  • Blind transfer, Attended transfer
  •  Music on hold support
  • Divert
  • Call intrusion
  • Conferencing (3-way conference)
  • Call park, Call pick-up
  • Call completion
  • CMC (Client Matter Code)

Web Server
  • Easy configuration of the phone, remote configuration
  • Embedded web server
  • Dial from web interface
  • Password protection
  • Diagnostics (tracing, logging)


  • https (server/client)
  • Transport Layer Security (TLS)
  • SRTP (RFC3711)
  • Certificates can be loaded into device

  • G.711 aLaw, uLaw
  • G.729A, G.723.1, GSM 6.10 (Full rate)
  • G.722 (16 kHz)

  • RFC3261 compliant
  • UDP, TCP, TLS support
  • Digest authentication
  • Loose routing and strict routing support
  • Error-information support
  • Reliability of provisional responses (RFC3262)
  • DNS SRV (RFC3263), redundant server support
  • Offer/answer (RFC3264)
  • Message waiting indication reception (RFC3842), subscription for MWI events (RFC3265)
  • Dialog-state
  • In-band DTMF/Out-of-band DTMF (RFC2833)
  • STUN client (NAT traversal)
  • ENUM (RFC3261)
  • NAPTR (RFC2915)
  • rport (RFC3581)
  • REFER (RFC3515)
  • Many other SIP features

  • Static IP provisioning, DHCP
  • http/https client for configuration
  • Automatic software update
  • Completely automatic installation from web

  • Dimensions: approx. 25x 20 x 12 cm
  • Weight: approx. 860 g
  • Safety: IEC 60950-1:2001 CB Test Certificate: DE 2-008417
  • Certifications: FCC Class B, CE Mark Commercial bridge on phone)

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