Description

Product information

• IP desk phone D735
• Operating system: Linux

Placement: indoor, desktop, wall mounting

Dimensions and weight

Dimensions (L x W x D, approx.) without footstand

• 230 mm × 205 mm × 90 mm

Dimensions (H x W x D, approx.) with footstand

• 220 mm × 205 mm × 190 mm (high angle 46°)
• 200 mm × 205 mm × 190 mm (low angle 28°)

Weight (approx.):

• 780 g with footstand
• 660 g without footstand

Display and indicators

Display

• TFT liquid crystal display (LCD): true colour, backlit
• Size (diagonal): 2.7″ (68 mm)
• Size (W × H): 54 mm × 41 mm
• Resolution: 320 × 240 pixel

13 LED indicators

• Call status indication: 1 red LED
• Message waiting indication (MWI): 1 red LED
• Function key status indication: 8 multicolour LEDs
• Audio key status indication: 3 LEDs (1 red / 2 green)

Keypad and function keys

43 hard keys in total

• 12 keys (standard ITU telephone keypad)
• 5-way navigation key
• 4 context-sensitive function keys
• Programmable function keys
  • 8 SmartLabel keys (with multicolour LED)
  • Key mapping of up to 32 functions (8 keys × 4 pages)
• 5 dedicated audio keys
  • Mute (with red LED)
  • Speakerphone (with green LED)
  • Headset (with green LED)
  • Volume + / – (rocker)
• 10 dedicated function keys
  • Ok
  • Cancel
  • DND
  • Message (with red LED)
  • Directory
  • Menu
  • Transfer
  • Hold
  • Page (rocker)

Expansion module connection via USB port for up to 3 × D7 / D7C1

Keyboard lock

Audio devices, codecs and features 

Casing microphone|Casing speaker

• Speakerphone mode: Full duplex, HD audio , Acoustic echo cancellation (AEC)

Corded handset

• Microphone|Handset earpiece
• Hearing aid compatible (HAC)

Audio codecs

• G.711 (A-law, μ-law), G.722, G.726, G.729AB, GSM 6.10 (FR), Opus

Dual-tone multi-frequency signalling (DTMF / RFC2833)

• SIP-INFO
• in-band
• out-of-band

Related features

• Built-in assignable ringtones
• Comfort Noise Generator (CNG)
• Voice Activity Detection (VAD)

User interfaces and setup

Configuration and setup via menu-driven web user interface (WUI)

• Password-protected login
• Secure web server/client (HTTPS)

Configuration and setup via menu-driven phone user interface (PUI)

Automatic configuration via provisioning

• Loading of settings and firmware via HTTP, HTTPS, TFTP
• Supported DHCP provisioning options 66 / 67
• Secure Redirection And Provisioning Service (SRAPS) support
• Plug & Play (PnP) support
• Remote management via TR-069 / TR-069 Annex G (TR-111)

Customisation

• XML browser

Localization

• Languages
• Time zone, dial tone

Diagnostic

• SIP / PCAP trace
• Syslog

Interfaces and connections

Power options

• Power over Ethernet (PoE)
  • IEEE 802.3af, class 2|IEEE 802.3az3
• Power adapter1
  • 100 – 240 V AC, 50 – 60 Hz | 5 V DC (SELV), 2 A, 10 W

Wired interfaces

• Power adapter:1 coaxial power connector (socket)
• Network connectivity: 2 × RJ45-8P8C sockets (LAN/PC) → Gigabit Ethernet (GbE)
• USB headsets and other accessories:1 USB 2.0 type A port
• Corded handset: RJ9-4P4C socket
• Headset:1 RJ9-4P4C socket
• EHS adapter:1 RJ12-6P6C socket

Wireless interfaces

• Network connectivity: WLAN optional via A2101

Sensors

• Hook switch sensor
• Ambient light sensor
• Proximity sensor

Networking technologies and protocols

Network technologies

• OpenVPN, VLAN (IEEE 802.1q)

VoIP related protocols and techniques

• SIP, SDP, RTP, RTCP, RTCP-XR, SIP REFER method (RFC 3515), rport (RFC 3581), ENUM, ICE, STUN

Secure VoIP protocols

• SIPS (SIP over TLS), SRTP, SRTCP

Network protocols

• IPv4 / IPv6 (dual stack), DHCP, NTP, LDAP, LLDP-MED, HTTP, TFTP, L2TP

Secure network protocols

• TLS V1.2, HTTPS, IEEE 802.1X (EAPoL)

Remote management protocols

• TR-069, TR-069 Annex G (formerly TR-111)

Directory support and call features

12 SIP identities / accounts

• Up to 12 simultaneous calls

Directory support

• LDAP (server-based directory)
• Local directory with up to 1,000 entries

Outgoing call features

• Speed dialling via function keys
• URL dialling
• Local dial plan
• Redial (via dialed calls list)
• Automatic redial on busy
• Caller identification (CLIP)
• Calling Line Identification Restriction (CLIR)
• Call completion (busy/unreachable)2
• Intercom
• Multicast paging

Incoming call features

• Call waiting/swapping
• Call barring/blocking: deny list, anonymous calls, Do Not Disturb (DND) mode
• Auto answer
• Call diversion

Connected call features

• Mute microphone
• Hold
• Music on hold2
• Blind call transfer
• Attended call transfer
• 3-way local conferencing
• Call park / unpark2
• Client Matter Code (CMC)2

Related features

• Call history lists of missed, received, dialed, rejected, and deflected calls
• Extension monitoring (Busy lamp field), call pickup2

Interoperability

Certified VoIP partner

Environmental conditions

Operating ambient temperature: 0 °C – +35 °C

Nonoperating (storage) temperature: -10 °C – +45 °C

Humidity (non-condensing): 5 % – 95 %

Package contents

Hardware

• IP desk phone D735
• Footstand
• Corded handset
• Ethernet cable

Documentation

• Quick Installation Guide
• GNU General Public License

Snom accessories and compatible devices

Power adapter

• Snom 10 W PSU (PN 00004570)

USB dongle

• WLAN: A210 (PN 00004384)
• DECT: A230 (PN 00004386)

EHS adapter

• EHS Advanced 2.0 (PN 00002362)

Wired headset via RJ9

• Binaural: A100D (PN 00004342), A310D (PN 00004626)
• Monaural: A100M (PN 00004341), A310M (PN 00004624)

Wired headset via USB

• Binaural: A330D (PN 00004598)
• Monaural: A330M (PN 00004597)

DECT headset via RJ9

• A170 (PN 00004387)

DECT headset via USB (DECT)

• A150 (PN 00004388)

Expansion module (USB)

• D7 (EoS) (PN 00004011)4, D7 (PN 00004382)
• D7C (PN 00004467)

Wireless conference speakerphone

C300 (PN 00004584)