Yealink SIP-T33P Administrator's Guide

Call Features
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configured for emergency routing, avoiding that emergency calls could not get through because of the server fail-
ure. If the phone is not locked, it checks against the regular dial plan. If the phone is locked, it checks against the
emergency dial plan.
Enhanced 911
E911 (Enhanced 911) is a location technology that enables the called party to identify the geographical location of
the calling party. For example, if a caller makes an emergency call to E911, the feature extracts the caller's inform-
ation for the police department to immediately identify the caller's location.
Topic
Emergency Dialplan and Enhanced 911 Configuration
Emergency Dialplan and Enhanced 911 Configuration
The following table lists the parameters you can use to configure emergency dialplan and Enhanced 911.
Parameter
dialplan.emergency.enable <y0000000000xx>.cfg
Description
It enables or disables the Emergency dialplan feature.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Parameter
dialplan.emergency.asserted_id_source <y0000000000xx>.cfg
Description
It configures the precedence of the source of emergency outbound identities when placing an emer-
gency call.
Note: If the obtained LLDP-MED ELIN value is blank and no custom outbound identity, the PAI header
will not be included in the SIP INVITE request. It works only if “dialplan.emergency.enable” is set to 1
(Enabled).
Permitted
Values
ELIN-The outbound identity used in the P-Asserted-Identity (PAI) header of the SIP INVITE request is
taken from the network using an LLDP-MED Emergency Location Identifier Number (ELIN). The cus-
tom outbound identity configured by “dialplan.emergency.custom_asserted_id” will be used if the
phone fails to get the LLDP-MED ELIN value.
CUSTOM-The custom outbound identity configured by “dialplan.emergency.custom_asserted_id” will
be used; if “dialplan.emergency.custom_asserted_id” is left blank, the LLDP-MED ELIN value will be
used.
HELD-The phone will use the HELD protocol to retrieve location information from the Location Inform-
ation Server.
GENBAND-Ribbon E911 feature is enabled, the location ID will be added to the INVITE and
REGISTER SIP messages.
Default
ELIN
Parameter
dialplan.emergency.asserted_id.sip_account <y0000000000xx>.cfg
Description
It configures the account to be used to retrieve E911 location information.
Permitted
Values
T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G: Integer from 1 to 16;
T53W/T53/T43U/T42U/T42S/T42G: Integer from 1 to 12;
T41P/T41S/T27G: Integer from 1 to 6;
T33P/T33G: Integer from 1 to 4;
T40P/T40G/T23P/T23G: Integer from 1 to 3;

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