Yealink VCM38 Administrator's Guide

| Traditional Deployment Methods | 64
2. Configure and save the following settings:
Parameter Description Configuration Method
Active/STUN Active
Enable or disable the STUN
(Simple Traversal of UDP over
NATs).
Default: Disabled.
Web user interface
Endpoint
CTP20/CTP18
STUN Server
Configure the IP address or
the domain name of the STUN
(Simple Traversal of UDP over
NATs) server.
Note: the default value is blank.
Web user interface
Endpoint
CTP20/CTP18
STUN Port
Configure the port of the STUN
(Simple Traversal of UDP over
NATs) server.
Default: 3478.
Web user interface
Endpoint
CTP20/CTP18
Enabling STUN Feature for SIP Protocol
If you want to make private-to-public calls via SIP protocol (SIP account and SIP IP call), you can enable
STUN feature for SIP protocol.
Procedure
1. Do one of the following:
• On your web user interface, go to Account > SIP Account/SIP IP Call > NAT Traversal.
• On your VCS, go to More > Settings > > Advanced > Account > SIP IP Call > NAT Traversal.
For VP59, tap Settings Advanced Account SIP IP Call NAT Traversal.
•
On your CTP20/CTP18, tap > Settings > Advanced > Account > SIP IP Call > NAT Traversal.
2. Configure and save the following settings:
Parameter Description Configuration Method
NAT Traversal
Select STUN.
Web user interface
Endpoint
CTP20/CTP18
Related tasks
Setting SIP Account/SIP IP Call
Configuring NAT
H.460
VCS allows the firewall traversal of H.323 calls via H.460 protocols. To use this feature, make sure your
gatekeeper supports H.460 feature.

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