User manual

T26:6.x.x.x
T22:7.x.x.x.
T20:9.x.x.x.
T38: 38.x.x.x
T32:32.x.x.x
VP530:23.x.x.x.
5． Q: When I use wireless headset with EXP38/39 and EHS36, the headset doesn’t work, what
can I do?
A: First, please check whether our EHS36 compatible with your wireless headset:
http://www.yealink.com/Upload/manual/TestedWirelessHeadsetListCompatiblewithEHS36-
03324790608.pdf
If your headset is in our compatible list, try to upgrade your EXP38/39 and EHS36:
Upgrade the EXP39:
How to upgrade the Yealink EXP39 via T28 or T26
Upgrade the EXP38:
How to upgrade the Yealink EXP38 via T28
Upgrade the EHS36:
http://www.yealink.com/Upload/document/HowtoUpgradeEHS36FirmwareviaT26V11-1936
5260359.pdf
http://www.yealink.com/Upload/document/HowtoUpgradeEHS36FirmwareviaT28V11-1936
3670088.pdf
Call Features
1. Q: If I configure the “Ringer Device for Headset” setting on the WEB UI, why the ring still
plays by speaker?
A: If you would like to play ringtone by headset, besides configure the setting of “Ringer
Device for Headset”, the Headset should be enabled by pressing the Headset button on the
keyboard (the LED of the headset will be on).
2. Q: Why my phone was dialed by a third party? Is my phone attacked?
A: Please upgrade to our latest V70 firmware, there’s some security issue in our previous
firmware, but we already fixed it in our V70 firmware.
http://www.yealink.com/SupportDownloadfiles_detail.aspx?CateId=184&flag=142
3. Q: What is “Semi-attended Transfer”?
A: As defined in RFC5589, it is “a hybrid between a fully attended transfer and an
unattended transfer”. We know that when a transferor makes an attended transfer to a
certain target, it waits till the target party answers and then complete the transfer, this is
attended transfer. If the server supports, the transferor can hang up the call before the
target party answers, and the transfer can also be completed, this is called semi-attended