Yealink SIP-T33P Administrator's Guide

Account Settings
310
l The phone performs a DNS query to resolve the domain name from the DNS server.
l If the DNS query returns no results for the domain name, or the returned record cannot be contacted, the values
in the static DNS cache (if configured) are used when their configured time intervals are not elapsed.
l If the configured time interval is elapsed, the phone will attempt to perform a DNS query again.
l If the DNS query returns a result, the phone will use the returned record from the DNS server and ignore the stat-
ically configured cache values.
When the phone is not configured with a DNS server, it will behave as follows:
l The phone attempts to resolve the domain name within the static DNS cache.
l The phone will always use the results returned from the static DNS cache.
Static DNS Cache Configuration
The following table lists the parameters you can use to configure static DNS cache.
Parameter
account.X.dns_cache_type
[1]
<MAC>.cfg
Description
It configures whether the phone uses the DNS cache for domain name resolution of the SIP server
and caches the additional DNS records.
Permitted
Values
0-Perform real-time DNS query rather than using DNS cache.
1-Use DNS cache, but do not record the additional records.
2-Use DNS cache and cache the additional DNS records.
Default
1
Parameter
account.X.static_cache_pri
[1]
<MAC>.cfg
Description
It configures whether preferentially to use the static DNS cache for domain name resolution of the SIP
server.
Permitted
Values
0-Use domain name resolution from server preferentially
1-Use static DNS cache preferentially
Default
0
Parameter
dns_cache_naptr.X.name
[2]
<y0000000000xx>.cfg
Description
It configures the domain name to which NAPTR record X refers.
Permitted
Values
Domain name
Default
Blank
Parameter
dns_cache_naptr.X.order
[2]
<y0000000000xx>.cfg
Description
It configures the order of NAPTR record X.
NAPTR record with the lower order is more preferred.
Permitted
Values
Integer from 0 to 65535
Default
0
Parameter
dns_cache_naptr.X.preference
[2]
<y0000000000xx>.cfg
Description
It configures the preference of NAPTR record X.
NAPTR record with lower preference is more preferred.
Permitted
Values
Integer from 0 to 65535

Yealink SIP-T33P Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Wall mountable	Yes
Operating system installed	Linux
Lines quantity	4 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	4
Volume control	Buttons
Number of function keys	5
Display diagonal	2.4 \
Display resolution	320 x 240 pixels
Voice codecs	AGC, AJB, CNG, G.711a, G.711u, G.722, G.723.1, G.726, G.729, G.729A, PLC, VAD, iLBC
Security algorithms	AES, HTTPS
Ethernet LAN data rates	10, 100 Mbit/s
Ethernet LAN interface type	Fast Ethernet
RJ-9 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Input frequency	50/60 Hz
AC adapter input voltage	100 - 240 V
Power consumption (typical)	3 W
Power consumption (Power over Ethernet (PoE))	5 W
Number of handles included	1 pc(s)
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %

Weight and Dimensions

Depth	186 mm
Width	212 mm
Height	146 mm