Yealink VCM38 Administrator's Guide

| System Maintenance | 266
Syntax Description
Host(s) Values: net, port, host, portrange
If no host(s) is specified, the "host" keyword is
used. For example: "src 10.1.1.1" is equivalent to
"src host 10.1.1.1".
Logical Operations Values: not, and, or
Negation ("not") has the highest priority. Alternation
("or") and concatenation ("and") have equal priority
and associate from left to right. For example, "not
tcp port 3128 and tcp port 23" is equivalent to "(not
tcp port 3128) and tcp port 23". "not tcp port 3128
and tcp port 23" is NOT equivalent to "not (tcp port
3128 and tcp port 23)".
Example: (src host 10.4.1.12 or src net 10.6.0.0/16) and tcp dst port range 200-10000 and dst net
10.0.0.0/8
Packets with source IP address 10.4.1.12 or source network 10.6.0.0/16, the result is then concatenated
with packets having destination TCP port range from 200 to 10000 and destination IP network 10.0.0.0/8.
Capturing the Packets via Remote Control
You can capture packets via your remote control, and store the packets to the USB flash drive. This feature
is not applicable to VP59.
Before you begin
If you want to save packets to the USB flash drive, make sure a USB flash drive is connected, and the USB
feature is enabled.
Procedure
1.
On the idle screen or during a call, long press on VCR11 or the Mute Key on VCR20.
The monitor prompts “Onekey-capture has been turned on, press the Backspace key for 2s to turn off
it”.
2.
Long press on VCR11 or the Mute Key on VCR20 for 5 seconds to stop capturing packets.
The packets are saved in the yealink.debug folder on your USB flash drive.
Related tasks
Configuring USB Storage
Capturing the Packets via Ethernet Software
Connect the Internet ports of your system and your computer to the same HUB, and then use Ethernet
software to capture the signal traffic.
System Firmware
The newly released firmware version may add new features. Therefore, Yealink recommends you to update
the latest firmware.

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