Linkus Desktop Client CTI Overview

Linkus Desktop Client can be used in softphone mode or CTI mode. This topic describes what is softphone mode and CTI mode and what call operations you can perform in each mode.

Softphone mode

A softphone is a software-based phone that is equivalent to a traditional deskphone, which allows you to make and receive calls over the Internet via a computer. A softphone not only has all the features of a deskphone, but also has additional features typical for online messaging, such as chat, video call, extension presence, etc.

If you don't have a deskphone in the office, you can set Linkus Desktop Client to softphone mode. In this way, you can perform the following operations to manage phone calls on your computer:
  • Make/End a call
  • Make a second call
  • Answer/Reject a call
  • Mute/Unmute a call
  • Transfer a call (attended transfer and blind transfer)
  • Record a call
  • Hold/Resume a call
  • Swap hold
  • Add participant
  • Merge calls
  • Call flip
  • And more

CTI mode

Computer Telephony Integration (CTI) connects a computer with a telephone system, which allows you to manage phone calls right on a computer.

If you prefer deskphone or Linkus Web Client for communication, you can set Linkus Desktop Client to CTI mode. In this way, Linkus Desktop Client acts as a visual control panel where you can perform the supported call operations, whereas calls are made and received from the connected deskphone / Linkus Web Client.

You can control IP phones and Linkus Web Client via Linkus Desktop Client CTI. Supported operations to manage calls via CTI vary from the connected endpoint. Refer to the following table for details.
Note:
Table 1. Supported call operations
Operations Compatible Yealink / Fanvil / Snom IP phones Other IP phones Linkus Web Client
Make/End a call √ √ √
Make a second call √ × √
Answer a call √ × √
Reject a call √ √ √
Mute/Unmute a call × × ×
Blind transfer a call √ √ √
Attended transfer a call √ × √
Record a call √ √ √
Hold/Resume a call √ √ √
Swap hold √ × √
Add participant × × √
Merge calls × × √
Flip a call √ × √
Table 2. Compatible Yealink IP phones
Phone Model Firmware Version
SIP-T21P_E2 52.84.0.125 or later
SIP-T21_E2 52.84.0.125 or later
SIP-T23P 44.84.0.125 or later
SIP-T23G 44.84.0.125 or later
SIP-T27G 69.85.0.5 or later
SIP-T29G 46.83.0.120 or later
SIP-T30P 124.85.0.15 or later
SIP-T31 124.85.0.15 or later
SIP-T31P 124.85.0.15 or later
SIP-T31G 124.85.0.15 or later
SIP-T33P 124.85.0.15 or later
SIP-T33G 124.85.0.15 or later
SIP-T31W 124.86.0.75 or later
SIP-T34W 124.86.0.75 or later
SIP-T40P 54.84.0.125 or later
SIP-T40G 76.84.0.125 or later
SIP-T41P 36.83.0.120 or later
SIP-T42G 29.83.0.120 or later
SIP-T46G 28.83.0.120 or later
SIP-T48G 35.83.0.120 or later
SIP-T41S 66.85.0.5 or later
SIP-T42S 66.85.0.5 or later
SIP-T46S 66.85.0.5 or later
SIP-T48S 66.85.0.5 or later
SIP-T41U 108.85.0.39 or later
SIP-T42U 108.85.0.39 or later
SIP-T43U 108.85.0.39 or later
SIP-T46U 108.85.0.39 or later
SIP-T48U 108.85.0.39 or later
SIP-T44U 108.86.0.90 or later
SIP-T44W 108.86.0.90 or later
SIP-T52S 70.84.0.70 or later
SIP-T54S 70.84.0.70 or later
SIP-T53 96.85.0.5 or later
SIP-T53W 96.85.0.5 or later
SIP-T54W 96.85.0.5 or later
SIP-T57W 96.85.0.5 or later
SIP-T56A 58.83.0.15 or later
SIP-T58 58.85.0.5 or later
SIP-T58W 150.86.0.5 or later
SIP-T58W 150.86.0.5 or later
VP59 91.85.0.5 or later
Table 3. Compatible Fanvil IP phones
Phone Model Firmware Version
X1S/X1SP 2.2.12 or later
X1SG 2.2.12 or later
X3SG 2.2.12 or later
X3U 2.2.12 or later
X2/X2P 2.14.0.7386 or later
X2C/X2CP 2.14.0.7386 or later
X3S/X3SP/X3G 2.14.0.7386 or later
X4/X4G 2.14.0.7386 or later
X4U 2.2.11 or later
X4U-V2 2.12.1 or later
X5U 2.2.11 or later
X5U-V2 2.12.1 or later
X5S 2.2.1 or later
X6 2.2.1 or later
X6U 2.2.11 or later
X6U-V2 2.12.1 or later
X7 2.2.11 or later
X7C 2.2.11 or later
X7A 2.2.0.229 or later
i56A 2.8.13 or later
A32 2.6.0.408 or later
A32i 2.6.0.408 or later
X210 2.2.11 or later
X210i 2.2.11 or later
X7-V2 2.12.1.3 or later
X7C-V2 2.12.1.3 or later
X210-V2 2.12.1.3 or later
X210i-V2 2.12.1.3 or later
X3S/X3SP Lite 2.4.5 or later
X3S/X3SP Pro 2.4.5 or later
X3SW 2.4.5 or later
X3SG Lite 2.4.5 or later
X3SG Pro 2.4.5 or later
X3U Pro 2.4.5 or later
V62 2.4.10 or later
V63 2.12.16.19 or later
V64 2.4.10 or later
A320 2.6.0.1402 or later
A320i 2.6.0.1402 or later
V67 2.6.0 or later
Table 4. Compatible Snom IP phones
Phone Model Firmware Version
D120 10.1.54.13 or later
D140 10.1.148.1 or later
D150 10.1.148.1 or later
D315 10.1.73.16 or later
D335 10.1.73.16 or later
D385 10.1.73.16 or later
D713 10.1.73.16 or later
D717 10.1.73.16 or later
D735 10.1.73.16 or later
D785 10.1.73.16 or later
D862 10.1.137.15 or later
D865 10.1.137.15 or later