Product Overview
17
- HTTPS (server/client)
- SRTP (RFC 3711)
- Transport Layer Security (TLS)
- VLAN (802.1q), QoS
- Digest authentication using MD5/MD5-sess
- Secure configuration file/call log file/contact file via AES encryption
- Phone lock for personal privacy protection
- Admin/User configuration mode
- 802.1X authentication
- Incoming signaling validation
Note
Expansion Modules
This section introduces EXP20, EXP40 and EXP50 expansion modules. The expansion modules
are consoles you can connect to Yealink IP phones to add DSS keys, which can be used to
assign predefined functionalities for quickly accessing features. If you want to configure the
expansion module keys, you have to connect the expansion module(s) to the IP phone in
advance.
The following table lists the supported IP phone models for these expansion modules:
Expansion modules enable you to handle large volume of calls on a regular basis and expand
the functional capability of your IP phone. For more information on how to connect and use the
expansion module, refer to
Yealink EXP-specific user guide
.
The following lists the available physical features of the currently supported LCD expansion
modules:
Not all key features described above are supported by CP860/CP920 IP phones when using
PSTN. For more information, refer to
Yealink phone-specific User Guide
.
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