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VoIP Phone Comparison

A VoIP phone or IP Phone uses Voice over IP (VoIP) technology for placing and transmitting telephone calls over an IP network, such as the Internet, instead of the traditional public switched telephone network (PSTN) such as Telkom.

Despite the difference in technology used with VoIP phone calls, dialling, talking on the phone and receiving phone calls is pretty much the same as is experienced with landline phones.

A VoIP phone or application may have many features an analogue phone doesn't support, such as e-mail-like IDs for contacts that may be easier to remember than names or phone numbers, or easy sharing of contact lists among multiple accounts.

No particular type of VoIP phone is required for using VoIP services. IP-based telephone services use control protocols such as Session Initiation Protocol (SIP) which is supported by all VoIP providers.

This following VoIP phone comparison was kindly provided by Zycko Distribution.

Entry Level Handsets - general office use

 

Polycom

Snom

Yealink

Entry Level Handsets

Model 

IP331

300

T20P

       
Display Resolution 102 x 33 2 x 16 character 3-line LCD
Max Lines Supported 2 2 2
Hard Keys, Soft Keys 15, 3 27 + 6 programmable keys 31 + 9 function keys
Power over Ethernet (POE) Yes Yes Yes
Full Duplex Speakerphone Yes Yes Yes
Backlit LCD Yes Yes Yes
RJ-9 Headset Port Yes Yes Yes
HD Voice No No No
Gigabit Ethernet Switch (GigE) No No No
Colour LCD No No No
Lync Compatible  Yes Yes No

 

Midpoint Handsets - middle management and personal assistants

 

Polycom

Snom

Yealink

 
Midpoint Handsets

Model 

VVX300/310

710/720

T26P

       
Display Resolution 208 x 104 resolution 4-line B/W display 132x64 graphic LCD
Max Lines Supported 6 Lines 12 Identities 3 Lines
Hard Keys, Soft Keys 4 softkeys 18 LED function keys 45 + 13 programmable keys
Power over Ethernet (POE) Yes Yes Yes
Full Duplex Speakerphone Yes Yes Yes
Backlit LCD Backlit 8-level Grayscale No Yes
RJ-9 Headset Port Yes Yes Yes
HD Voice Yes Yes Yes
Gigabit Ethernet Switch (GigE) Model 30:0 No, Model 310: Yes Yes No
Colour LCD No No Yes
Expansion Module (Optional) Yes No Yes
Lync Compatible  Yes Yes No

 

Colour Midpoint Handsets - middle management and personal assistants

 

Polycom

Snom

Yealink

 
Colour Midpoint Handsets

Model 

VVX400/410

760

T32G

       
Display Resolution 320 x 240 resolution 320 x 240 pixels  400 x 240 pixel, 262K
Max Lines Supported 12 Lines - 3
Hard Keys, Soft Keys 4 Soft keys  16 + 4 variable 32 + 3 programmable keys
Power over Ethernet (POE) Yes Yes Yes
Full Duplex Speakerphone Yes Yes Yes
Backlit LCD 3.5" Colour LCD 18 bits colour 3” TFT-LCD
RJ-9 Headset Port Yes Yes Yes
HD Voice Yes Yes Yes
Gigabit Ethernet Switch (GigE) 400 No / 410 Yes Yes Yes
Color LCD Backlit 3.5” colour LCD Yes Yes
Expansion Module (Optional) Yes No No
Lync Compatible  Yes Yes No

 

Video Conference Handsets - senior management, directors and financial executives

 

Polycom

Snom

Yealink

 
Executive / Desktop Video Conference Handsets

Model 

VVX500

821

VP530

       
Display Resolution 320x240 pixel touch screen 3,5" 320 x 240 pixel 800x480 pixels resolution
Max Lines Supported 12 Lines 12 lines 4 VoIP accounts
Hard Keys, Soft Keys Touch Screen Interface 4 hard keys, 12 virtual keys 27 keys including 4 soft keys
Power over Ethernet (POE) Yes Yes Yes
Full Duplex Speakerphone Yes Yes Yes
Backlit LCD 3.5-in TFT LCD High-resolution TFT colour display 7" digital TFT-LCD
RJ-9 Headset Port Yes Yes PSTN optional, 2.5mm headset port
HD Voice Yes Yes Yes
Gigabit Ethernet Switch (GigE) Yes Yes Yes
Colour LCD Yes Yes Yes
Expansion Module (Optional) Yes No No
Lync Compatible  Yes Yes No
Camera Option  Yes No Yes

 

Reception Handsets - Front office staff
 

Polycom

Snom

Yealink

 

 

Reception Handsets

Model 

VVX600

870

T38G

       
Display Resolution 4.3in LCD (480x272 pixel) 4.3” TFT 480 x 272 480 x 272 pixel, 16.7M colors
Max Lines Supported 16 Lines   6
Hard Keys, Soft Keys Touch Screen  15 , 12 48 + 16 programmable keys
Power over Ethernet (POE) Yes Yes Yes
Full Duplex Speakerphone Yes Yes Yes
Backlit LCD Yes Yes 4.3” TFT-LCD
RJ-9 Headset Port Yes Yes Yes
HD Voice Yes Yes Yes
Gigabit Ethernet Switch (GigE) Yes Yes Yes
Colour LCD Colour Touch display TFT Touch Colour Yes
Expansion Module (Optional) Yes Yes Yes
Lync Compatible  Yes Yes No
Camera Option  Yes No No
Warranty  1 Year  1 Year 1 Year

 

VoIP Phone Technology considerations
  • Requires Internet access to make calls when not connected to a local private branch exchange (PBX) via a LAN
  • VoIP phones and the routers depend on mains electricity for power, unlike PSTN phones, which are supplied with power from the telephone exchange. However, this can be mitigated by installing a UPS
  • The Power over Ethernet interface simplifies this immensely since power can be "injected" at any connector or at the router. This is a major reason the dominant call center and PBX VoIP systems rely on PoE exclusively IP network
  • Particularly residential Internet connections may become congested. This can cause poorer voice quality or the call to be dropped completely. As commercial grade routers begin to incorporate "managed" or "carrier" Quality of Service (QoS) features, this is less of an issue, but such features typically require expert configuration
  • Due to the latency induced by protocol overhead and other factors they may not work as well on satellite Internet, analog cell ("edge" networks) and other high-latency Internet connections
  • VoIP phones, like other network devices can be subjected to denial-of-service attacks as well as other attacks especially if the device is given a public IP address; this is especially significant as an issue with wireless devices using 802.11 protocols.