Yealink SIP-T48G Administrator's Guide

Configuring Security Features
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2. Select the desired value from the pull-down list of Device Certificates.
3. Click Confirm to accept the change.
To upload a server certificate via web user interface:
1. Click on Security->Server Certificates.
2. Click Browse to select the certificate (*.pem and *.cer) from your local system.
3. Click Upload to upload the certificate.
A dialog box pops up to prompt “Success: The Server Certificate has been loaded!
Rebooting, please wait…”.
Secure Real-Time Transport Protocol (SRTP) encrypts the RTP during VoIP phone calls to
avoid interception and eavesdropping. The parties participating in the call must enable
SRTP feature simultaneously. When this feature is enabled on both phones, the type of
encryption to utilize for the session is negotiated between the IP phones. This
negotiation process is compliant with RFC 4568.
When a user places a call on the enabled SRTP phone, the IP phone sends an INVITE
message with the RTP encryption algorithm to the destination phone. As described in
RFC 3711, RTP streams may be encrypted using an AES (advanced encryption standard)
algorithm.

Yealink SIP-T48G Specifications

General

Expansion module support	Yes
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Volume control	-
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
AC adapter input voltage	100 - 240 V
Number of handles included	1 pc(s)

Weight and Dimensions

Width	266 mm
Height	185 mm