Yealink CP860 Administrator's Guide

Configuring Security Features
305
This chapter provides information for making configuration changes for the following
security-related features:
 Transport Layer Security
 Secure Real-Time Transport Protocol
 Encrypting Configuration Files
TLS is a commonly-used protocol for providing communications privacy and managing
the security of message transmission, allowing IP phones to communicate with other
remote parties and connect to the HTTPS URL for provisioning in a way that is designed
to prevent eavesdropping and tampering.
TLS protocol is composed of two layers: TLS Record Protocol and TLS Handshake
Protocol. The TLS Record Protocol completes the actual data transmission and ensures
the integrity and privacy of the data. The TLS Handshake Protocol allows the server and
client to authenticate each other and negotiate an encryption algorithm and
cryptographic keys before data is exchanged.
The TLS protocol uses asymmetric encryption for authentication of key exchange,
symmetric encryption for confidentiality, and message authentication codes for
integrity.
 Symmetric encryption: For symmetric encryption, the encryption key and the
corresponding decryption key can be told by each other. In most cases, the
encryption key is the same as the decryption key.
 Asymmetric encryption: For asymmetric encryption, each user has a pair of
cryptographic keys – a public encryption key and a private decryption key. The
information encrypted by the public key can only be decrypted by the
corresponding private key and vice versa. Usually, the receiver keeps its private
key. The public key is known by the sender, so the sender sends the information
encrypted by the known public key, and then the receiver uses the private key to
decrypt it.
CP860 IP conference phones support TLS 1.0. A cipher suite is a named combination of
authentication, encryption, and message authentication code (MAC) algorithms used
to negotiate the security settings for a network connection using the TLS/SSL network
protocol. CP860 IP conference phones support the following cipher suites:
 DHE-RSA-AES256-SHA
 DHE-DSS-AES256-SHA

Yealink CP860 Specifications

General

Speakerphone	Yes
Voice codecs	G.711, G.722, G.729ab, iLBC
Handset type	-
Product type	IP Phone
Product color	Black
Display resolution	192 x 64 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	1
Networking standards	IEEE 802.1x, IEEE 802.3af
Supported network protocols	IPv4/IPv6
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
AC adapter input voltage	100 - 240 V
AC adapter output current	2 A
AC adapter output voltage	5 V
Number of handles included	- pc(s)
Storage temperature (T-T)	10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %

Weight and Dimensions

Depth	260 mm
Width	320 mm
Height	52 mm