The Yealink SiP handsets provide excellent voice quality at really low prices for any IP network - use as stand-alone phones, or as part of your IP PBX solution.
When we assess the products we sell, we consider these issues carefully:


And just as important is Support.

Which is why we chose Yealink, Polycom and Oscom handsets - the perfect partners for Xorcom, ideal for use with headsets in call centres, or in normal business use.



The OSCOM 520 - Professional 4-line VoIP Handset
Oscom handsets use highly integrated chipsets and sophisticated design techniques to provide a wide range of features in these high performance quality phones.
Key Features:
  • Superior Sound Quality
  • Easy set-up and easy to use
  • Multi-line functionality
  • Upgradeable phone software
Volume discounts and reseller prices available.
Technical Specification
  • Integrated 2 port ethernet switch
  • Ethernet 1 x IEEE 802.3 10 Mbps/ 803.3u 100 Mbps
  • Auto-negotiation with link speed full/half duplex mode.
  • Auto MDI/MDIX or both downlink and uplink
  • Support QoS IEEE 802.1p voice priority function

User Interface
  • Display: LCD - Liquid Crystal Display
  • 12 numerical keypad; 5 key navikey; 2 soft keys; 2 hook keys
  • Caller ID
  • Message waiting indication
  • Address Book (170 entries)
  • Speed Dialing
  • List of recently missed/received/dialled calls (20 entries)
  • Call waiting indication
  • Clock, daylight saving, call timer
  • Menu-driven UI
  • Polyphonic ring tome
  • Speakerphone

Audio Features
  • Ringer volume - 6 levels + off (off displays 'silence' icon)
  • Key sounds - click, DTMF and special tones

Call Features
  • Local dial plan (group calls)
  • Call hold
  • Call transfer (attended or blind)
  • Music on hold (support via PBX)
  • Call divert
  • Conferencing (2 handsets + 1 VoIP or 1 handset + 2 VoIP)
  • Call park and Call pick-up (supported via PBX)
  • Call waiting/switching between calls
  • Redial
  • Intercom - handset to handset via gateway
  • Call forward - all, on-busy, on no answer
  • Support for softswitch
  • Caller ID with name from internal phonebook
  • Voicemail support (reception and handling of voicemail indication and call to voicemail server

Power Supply
  • Input 5VDC/1.5A power adapter (the power adapter is optional)
  • Power consumption is 2.5W standby and maximum 3.5W
  • Support for Power over Internet (PoE) IEEE 802.3af device class 2 (7W)
Voice Handling
  • Supports multiple audio Codecs - G.711 (64kbps A-law /u-law), G.729A*, G.723.1*, (6.3K/5.3K).
  • Supports Voice Activity Detection (VAD and CNG) - volume adjustable for handset, headset, hands-free and hands-free ring output
  • Supports G165 16mS line echo cancellation
  • Adaptive Jitter Buffering function
  • Hands-free talking supported
  • Supports multiple calls and multiple line appearance
NOTE: *These features are optional. Please call for pricing.

  • RFC3261 Compliance
  • Digest/basic authentication
  • DNS SRV (RFC3263), redundant server support
  • Offer/answer (RFC3264)
  • MWI (RFC3842) and subscription for MWI events (RFC3265)
  • DTMF sending in-call (in-band, info message and RFC2833)
  • STUN client (NAT traversal)
  • rport (RFC3581)
  • REFER (RFC3515)
  • 8 SIP registrations with one SIP server/registrar
  • SIP configuration from handset or via website

Tone Function
  • DTMF tone generation and detection
  • Side tone and good voice quality supported
  • Outbound DTMF relay (RFC2833/SIP-INFO) support
  • Local tone support (dial, ring, ring-back, busy, and other related tones)

This can be achieved in two ways:
At the Handset Display
The first time the phone is connected to the internet it connects to the OSCOM configuration server and a dynamic list of service providers in different countries is presented in the display. The user selects the approved VoIP provider, enters username and password and phone is ready to use.
At the Web Interface
The phone can also be manually configured via the website - local details supplied.

  • Dimensions: 210mm x 230mm x 50mm
  • Plastic material ABS type
  • Support two angles, with or without stand
  • Can be wall mounted
  • Detachable handset and curly cord

We have staked our business on the quality of the products we sell and we are confident that you can too.