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Yealink SIP-T53W Administrator's Guide

Yealink SIP-T53W
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Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
305
Description
It enables or disables the phone to only send requests to the registered outbound proxy server when
encountering a failover.
Note: It works only if “account.X.outbound_proxy.Y.register_on_enable” is set to 1 (Enabled) and
“account.X.outbound_proxy.Y.failback_mode is set to 1, 2 or 3.
Permitted
Values
0-Disabled
1-Enabled
Default -1, the phone will invoke “account.X.sip_server.Y.only_signal_with_registered” to take effect.
Parameter
account.X.outbound_proxy.Y.invite_retry_counts
[1][2]
<MAC>.cfg
Description
It configures the number of retries attempted before sending requests to the next available outbound
proxy server when encountering a failover.
Permitted
Values
Integer from 1 to 10
Default -1, the phone will invoke “account.X.sip_server.Y.invite_retry_counts” to take effect.
Parameter
account.X.outbound_proxy.Y.failback_mode
[1][2]
<MAC>.cfg
Description
It configures the failback mode for the phone to retry the primary outbound proxy server in failover.
Note: DNSTTL, Registration and duration mode can only be processed when the IP phone is idle (that
is, no incoming/outbound calls, no active calls or meetings, and so on).
Permitted
Values
0-newRequests: all requests are sent to the primary outbound proxy server first, regardless of the last
server that was used. If the primary outbound proxy server does not respond correctly, the phone will
try to send requests to the secondary outbound proxy server.
1-DNSTTL: the phone will send requests to the last registered outbound proxy server first. If the TTL
for the DNS A records on the registered outbound proxy server expires, the phone will retry to send
requests to the primary outbound proxy server.
2-Registration: the phone will send requests to the last registered outbound proxy server first. If the
registration expires, the phone will retry to send requests to the primary outbound proxy server.
3-duration: the phone will send requests to the last registered outbound proxy server first. If the time
defined by the parameter “account.X.outbound_proxy.Y.failback_timeout expires, the phone will retry
to send requests to the primary outbound proxy server.
Default -1, the phone will invoke “account.X.sip_server.Y.failback_mode to take effect.
Parameter
account.X.outbound_proxy.Y.failback_timeout
[1][2]
<MAC>.cfg
Description
It configures the timeout (in seconds) for the phone to retry to send requests to the primary outbound
proxy server after failing over to the current working server.
If you set the parameter to 0, the phone will not send requests to the primary outbound proxy server
until a failover event occurs with the current working server.
Note: It works only if “account.X.outbound_proxy.Y.failback_mode” is set to 3 (duration).
Permitted
Values
0, Integer from 60 to 65535
Default -1, the phone will invoke “account.X.sip_server.Y.failback_timeout to take effect.
Parameter
account.X.outbound_proxy.Y.failback_subscribe.enable
[1][2]
<MAC>.cfg
Description
It enables or disables the phone to retry to re-subscribe after registering to the secondary outbound
proxy server with different IP addresses when encountering a failover.
Note: It works only if “account.X.outbound_proxy.Y.failback_mode” is set to 1, 2 or 3.
Permitted
Values
0-Disabled
1-Enabled, the phone will immediately re-subscribe to the secondary outbound proxy server, for ensur-

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Yealink SIP-T53W Specifications

General IconGeneral
MountingDesk/Wall
Handset typeWired handset
Product typeIP mobile phone
Product colorGray
Keypad illuminationYes
Wi-Fi standards802.11a, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version4.2
Security algorithmsAES, HTTPS, SIPS
Networking standardsIEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface typeGigabit Ethernet
Supported network protocolsFTP/TFTP/HTTP/HTTPS
Dual-Tone Multi-Frequency (DTMF) modesIn-band, Out-of band, SIP info
USB 2.0 ports quantity1
Ethernet LAN (RJ-45) ports2
Lines quantity8 lines
Phonebook capacity1000 entries
Number of VoIP accounts12
AC adapter input voltage100 - 240 V
AC adapter output current1.2 A
AC adapter output voltage5 V
Power consumption (typical)2.3 W
Volume controlButtons
Number of programmable keys8
Storage temperature (T-T)-30 - 70 °C
Operating temperature (T-T)0 - 40 °C
Operating relative humidity (H-H)10 - 95 %
Display diagonal3.7 \
Display resolution360 x 160 pixels
Cables includedLAN (RJ-45)
Number of handles included1 pc(s)
Number of DECT wireless handsets4
Voice codecsG.722, G.723.1, G.726, G.729A, G.729B, OPUS, iLBC
Weight and Dimensions IconWeight and Dimensions
Depth210.6 mm
Width212 mm
Height174.5 mm

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