Parameter name
Default value
Description
For IP office environment, the applicable values
are 0 and 1.
SYMMETRIC_RTP
1
Specifies if the phone must discard received RTP
or SRTP datagrams if their UDP source port
number is not the same as the UDP destination
port number included in the RTP or SRTP
datagrams of that endpoint.
Value Operation:
• 0: Ignore the UDP source port number in
received RTP/SRTP datagrams.
• 1: Discard received RTP/SRTP datagrams if their
UDP Source Port number does not match the
UDP Destination Port number that the phone
includes in RTP/SRTP datagrams intended for
that phone.
SNTP_SYNC_INTERVAL
1440
Specifies the time interval in minutes when the
phone attempts to synchronize its time with the
configured NTP servers.
Valid values are from 60 min. to 2880 min.
SYSTEM_LANGUAGE
Contains the name of the default system language
file used in the phone. The filename should be one
of the files listed in the LANGUAGES parameter.
If no filename is specified, or if the filename does
not match one of the LANGUAGES values, the
phone uses the built-in English text strings.
Valid values range from 0 through 32 ASCII
characters.
Filename must end in .xml
T
TCP_KEEP_ALIVE_STATUS
1
Specifies if the phone sends TCP keep alive
messages.
Value Operation:
• 0: Keep-alive messages are not sent.
• 1: Keep-alive messages are sent (default).
TCP_KEEP_ALIVE_INTERVAL
10
Specifies the number of seconds that the
telephone waits before re-transmitting a TCP keep-
alive (TCP ACK) message.
Valid values are from 5 through 60.
Table continues…
September 2017
Installing and Administering Avaya J129 IP Phone
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