Yealink SIP-T2 Series User Manual

Product Overview
13
- TR-069
 Security
- 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
Expansion Modules
This section introduces EXP20 and EXP40 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 Module
Phone Model
EXP20
SIP-T29G/T27P/T27G
EXP40
SIP-T48G/T48S/T46G/T46S
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:

Yealink SIP-T2 Series Specifications

General

Brand	Yealink
Model	SIP-T2 Series
Category	IP Phone
Language	English