Yealink SIP-T48U Administrator's Guide

Network Configurations
35
Related Topic
DHCP Provision Configuration
VLAN
The purpose of VLAN configurations on the phone is to insert a tag with VLAN information to the packets generated
by the phone. When VLAN is properly configured for the ports (Internet port and PC port) on the phone, the phone
will tag all packets from these ports with the VLAN ID. The switch receives and forwards the tagged packets to the
corresponding VLAN according to the VLAN ID in the tag as described in IEEE Std 802.3.
In addition to manual configuration, the phone also supports the automatic discovery of VLAN via LLDP, CDP or
DHCP. The assignment takes effect in this order: assignment via LLDP/CDP, manual configuration, then assign-
ment via DHCP.
For more information on VLAN, refer to VLAN Feature on Yealink IP Phones.
Topics
LLDP Configuration
CDP Configuration
Manual VLAN Configuration
DHCP VLAN Configuration
VLAN Change Configuration
LLDP Configuration
LLDP (Linker Layer Discovery Protocol) is a vendor-neutral Link Layer protocol, which allows the phones to advert-
ise its identity and capabilities on the local network.
When LLDP feature is enabled on the phones, the phones periodically advertise their own information to the dir-
ectly connected LLDP-enabled switch. The phones can also receive LLDP packets from the connected switch and
obtain their VLAN IDs.
The following table lists the parameters you can use to configure LLDP.
Parameter
static.network.lldp.enable
[1]
<y0000000000xx>.cfg
Description
It enables or disables the LLDP feature.
Permitted
Values
0-Disabled
1-Enabled, the phone attempts to determine its VLAN ID through LLDP.
Default
1
Web UI
Network > Advanced > LLDP > Active
Phone UI
Color Screen Phones:
Menu > Advanced (default password: admin) > Network > LLDP > LLDP Status
Black-and-white Screen Phones:
Menu > Settings > Advanced Settings (default password: admin) > Network > LLDP > LLDP Status
Parameter
static.network.lldp.packet_interval
[1]
<y0000000000xx>.cfg
Description
It configures the interval (in seconds) that how often the phone sends the LLDP request.
Note: It works only if “static.network.lldp.enable” is set to 1 (Enabled).
Permitted
Values
Integer from 1 to 3600
Default
60

Yealink SIP-T48U Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Gray
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.
Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Display diagonal	7 \
Display resolution	800 x 480 pixels
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
Voice codecs	AGC, AJB, AMR-WB, CNG, G.711, G.722, G.723.1, G.726, G.729ab, VAD, iLBC
Security algorithms	AES, HTTPS, SRTP, TLS
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Front camera	-
AC adapter input voltage	100 - 240 V
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Keypad number of keys	29
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Width	226 mm
Height	185 mm