Yealink VCM38 Administrator's Guide

| Configuring Network Settings | 91
Parameter Description Configuration Method
Data Priority/
Data Priority (0-63)
Configure the DSCP
(Differentiated Services Code
Point) for data packets.
Note: the default value is 63.
The greater the number is,
the higher the priority is. If you
change this parameter, the
system will reboot to make the
change take effect.
Web user interface
Endpoint
CTP20/CTP18
Configuring MTU
Data packets that exceed the maximum transmission unit (MTU) size for any router or segment along the
network path may be fragmented or dropped, which may result in poor quality video at the receiving device.
You can set the maximum MTU size of the data packets sent by the system.
About this task
Configure the MTU size used in calls based on the network bandwidth settings. If the video becomes
blocky or network errors occur, packets may be too large; decrease the MTU. If the network is burdened
with unnecessary overhead; packets may be too small, increase the MTU.
Procedure
1. Do one of the following:
• On your web user interface, go to Network > Advanced > MTU.
• On your VCS: go to More > Settings > Network Setting > Wired Network > Advanced Network >
MTU(1000-1500).
For VP59, tap > Settings > Network Setting > Wired Network > Advanced Network >
MTU(1000-1500).
•
On your CTP20/CTP18, tap > Settings > Network Setting > Host Network > Advanced
Network > Network MTU (1000-1500).
2. Configure and save the following settings:
Parameter Description Configuration Method
Network MTU (1000-1500)
Specify the maximum MTU size
(bytes) of data packets sent by
the system.
Note: the value can be any
integer from 1000 to 1500. The
default value is 1500.
If you change this parameter, the
system will reboot to make the
change take effect.
Web user interface
Endpoint
CTP20/CTP18

Yealink VCM38 Specifications

General

Type	Conference microphone
Noise reduction	Yes
Microphone frequency	100 - 16000 Hz
Microphone sensitivity	-45 dB
Microphone pick-up range	6 m
Number of microphone arrays	8
Maximum sound pressure level (1kHz)	100 dB
Device interface	RJ-45
Connectivity technology	Wired
Maximum operating distance	40 m
Mounting type	Ceiling
Product color	Silver
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	5 - 90 %
Number of products included	1 pc(s)
Harmonized System (HS) code	85181000
Power source	DC/PoE
Sustainability certificates	CE, Federal Communications Commission (FCC), REACH, RoHS

Weight and Dimensions

Width	127.3 mm
Height	66.3 mm