Yealink T4S series IP Phones
Enrich Collaboration, Improve Productivity
Description
| Resolution | 800 x 480 | 800 x 480 | 480 x 272 | 480 x 272 | 192 x 64 | 192 x 64 | 192 x 64 | 192 x 64 | 132 x 64 | 132 x 64 |
| √ | √ | √ | √ | √ | √ | |||||
| External Yealink AC Adapter (optional) | AC 100~240V input and DC 5V/2A output | AC 100~240V input and DC 5V/2A output | AC 100~240V input and DC 5V/2A output | AC 100~240V input and DC 5V/2A output | AC 100~240V input and DC 5V/1.2A output | AC 100~240V input and DC 5V/1.2A output | AC 100~240V input and DC 5V/1.2A output | AC 100~240V input and DC 5V/1.2A output | AC 100~240V input and DC 5V/600mA output | AC 100~240V input and DC 5V/600mA output |
| Line Key | 0 | 0 | 10 | 10 | 6 | 6 | 6 | 6 | 3 | 3 |
| Memory Key | 29 touch keys | 29 touch keys | 27 (3 pages of 9 keys) | 27 (3 pages of 9 keys) | 15 (3 pages of 5 keys) | 15 (3 pages of 5 keys) | 15 (3 pages of 5 keys) | 15 (3 pages of 5 keys) | 3 | 3 |
| Yealink EXP50 Expansion Module (Accessory, purchased separately) |
X | X | X | X | X | X | X | X | X | X |
| Yealink EXP40 Expansion Module (Accessory, purchased separately) |
√ | √ | √ | √ | x | x | x | x | x | x |
| Yealink EXP20 Expansion Module (Accessory, purchased separately) |
X | X | X | X | X | X | X | X | X | X |
| Yealink EHS36 Wireless Headset Adapter (Accessory, purchased separately) |
√ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| Yealink YHS32 Headset (Accessory, purchased separately) |
√ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| Yealink Bluetooth Adapter BT40 (Accessory, purchased separately) |
√ | √ | √ | √ | √ | X | √ | X | X | X |
| Yealink Wi-Fi Adapter WF40 (Accessory, purchased separately) |
√ | √ | √ | √ | √ | X | √ | X | X | X |
| USB Recording | √ | √ | √ | √ | √ | X | √ | X | X | X |
| 3-way Conferencing | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| HD Voice | HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
| Wide-band Codecs | G.722，Opus | G.722 | G.722,Opus | G.722 | G.722, Opus | G.722 | G.722,Opus | G.722 | G.722,Opus | G.722, Opus |
| Narrow-band Codecs | G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC, Opus |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC, Opus |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC, Opus |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC |
G.711(A/µ),G.729, G729A, G.726, G.723.1, iLBC, Opus |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC |
G.711(A/µ), G.729, G729A, G.726, iLBC | G.711(A/µ), G.729, G729A G.726, iLBC |
| LCD Type | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed |
| Operating System | Linux | Linux | Linux | Linux | Linux | Linux | Linux | Linux | Linux | Linux |
| Built-in Bluetooth | X | X | X | X | X | X | X | X | X | X |
| Built-in Wi-Fi | X | X | X | X | X | X | X | X | X | X |
| USB Headset (Accessory, purchased separately) |
√ | X | √ | X | √ | X | √ | X | X | X |
| Camera | X | X | X | X | X | X | X | X | X | X |
| Video Resolution | X | X | X | X | X | X | X | X | X | X |
| Video Codecs | X | X | X | X | X | X | X | X | X | X |
| 3-way Video Conferencing | X | X | X | X | X | X | X | X | X | X |
| 5-way video/audio mixed conferencing | X | X | X | X | X | X | X | X | X | X |
| HDMI | X | X | X | X | X | X | X | X | X | X |
ModelSIP-T48SSIP-T48GSIP-T46SSIP-T46GSIP-T42SSIP-T42GSIP-T41SSIP-T41PSIP-T40GSIP-T40P
| Model | SIP-T48S | SIP-T48G | SIP-T46S | SIP-T46G | SIP-T42S | SIP-T42G | SIP-T41S | SIP-T41P | SIP-T40G | SIP-T40P |
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| Download | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet | Datasheet |
| LCD | 7″ color touch screen |
7″ color touch screen |
4.3″ color LCD | 4.3″ color LCD | 2.7″ graphical LCD | 2.7″ graphical LCD | 2.7″ graphical LCD | 2.7″ graphical LCD | 2.3″ graphical LCD | 2.3″ graphical LCD |
| Resolution | 800 x 480 | 800 x 480 | 480 x 272 | 480 x 272 | 192 x 64 | 192 x 64 | 192 x 64 | 192 x 64 | 132 x 64 | 132 x 64 |
| LCD Backlight | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| Line | 16 | 16 | 16 | 16 | 12 | 12 | 6 | 6 | 3 | 3 |
| PoE | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| GigE | √ | √ | √ | √ | √ | √ | x | x | √ | x |
| Wall Mounting | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| Foot Stand | 2 adjustable angles | 2 adjustable angles | 2 adjustable angles | 2 adjustable angles | 2 adjustable angles | 2 adjustable angles | 2 adjustable angles | 2 adjustable angles | 2 adjustable angles | 2 adjustable angles |
| USB Port (2.0 compliant) | 1 | 1 | 1 | 1 | 1 | x | 1 | x | x | x |
| Ethernet Port | Dual-port Gigabit Ethernet | Dual-port Gigabit Ethernet | Dual-port Gigabit Ethernet | Dual-port Gigabit Ethernet | Dual-port Gigabit Ethernet | Dual-port Gigabit Ethernet | 2 x RJ45 10/100M Ethernet ports | 2 x RJ45 10/100M Ethernet ports | Dual-port Gigabit Ethernet | 2 x RJ45 10/100M Ethernet ports |
| Handset Port (RJ-9) | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| Headset Port (RJ-9) | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| External Yealink AC Adapter (optional) | AC 100~240V input and DC 5V/2A output | AC 100~240V input and DC 5V/2A output | AC 100~240V input and DC 5V/2A output | AC 100~240V input and DC 5V/2A output | AC 100~240V input and DC 5V/1.2A output | AC 100~240V input and DC 5V/1.2A output | AC 100~240V input and DC 5V/1.2A output | AC 100~240V input and DC 5V/1.2A output | AC 100~240V input and DC 5V/600mA output | AC 100~240V input and DC 5V/600mA output |
| Line Key | 0 | 0 | 10 | 10 | 6 | 6 | 6 | 6 | 3 | 3 |
| Memory Key | 29 touch keys | 29 touch keys | 27 (3 pages of 9 keys) | 27 (3 pages of 9 keys) | 15 (3 pages of 5 keys) | 15 (3 pages of 5 keys) | 15 (3 pages of 5 keys) | 15 (3 pages of 5 keys) | 3 | 3 |
| Yealink EXP50 Expansion Module (Accessory, purchased separately) |
X | X | X | X | X | X | X | X | X | X |
| Yealink EXP40 Expansion Module (Accessory, purchased separately) |
√ | √ | √ | √ | x | x | x | x | x | x |
| Yealink EXP20 Expansion Module (Accessory, purchased separately) |
X | X | X | X | X | X | X | X | X | X |
| Yealink EHS36 Wireless Headset Adapter (Accessory, purchased separately) |
√ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| Yealink YHS32 Headset (Accessory, purchased separately) |
√ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| Yealink Bluetooth Adapter BT40 (Accessory, purchased separately) |
√ | √ | √ | √ | √ | X | √ | X | X | X |
| Yealink Wi-Fi Adapter WF40 (Accessory, purchased separately) |
√ | √ | √ | √ | √ | X | √ | X | X | X |
| USB Recording | √ | √ | √ | √ | √ | X | √ | X | X | X |
| 3-way Conferencing | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
| HD Voice | HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
HD Speaker HD Handset |
| Wide-band Codecs | G.722，Opus | G.722 | G.722,Opus | G.722 | G.722, Opus | G.722 | G.722,Opus | G.722 | G.722,Opus | G.722, Opus |
| Narrow-band Codecs | G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC, Opus |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC, Opus |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC, Opus |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC |
G.711(A/µ),G.729, G729A, G.726, G.723.1, iLBC, Opus |
G.711(A/µ), G.729, G729A, G.726, G.723.1, iLBC |
G.711(A/µ), G.729, G729A, G.726, iLBC | G.711(A/µ), G.729, G729A G.726, iLBC |
| LCD Type | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed | Fixed |
| Operating System | Linux | Linux | Linux | Linux | Linux | Linux | Linux | Linux | Linux | Linux |
| Built-in Bluetooth | X | X | X | X | X | X | X | X | X | X |
| Built-in Wi-Fi | X | X | X | X | X | X | X | X | X | X |
| USB Headset (Accessory, purchased separately) |
√ | X | √ | X | √ | X | √ | X | X | X |
| Camera | X | X | X | X | X | X | X | X | X | X |
| Video Resolution | X | X | X | X | X | X | X | X | X | X |
| Video Codecs | X | X | X | X | X | X | X | X | X | X |
| 3-way Video Conferencing | X | X | X | X | X | X | X | X | X | X |
| 5-way video/audio mixed conferencing | X | X | X | X | X |
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