User's Manual

Parameter
name
Description Default
value
Boundaries
Keep-alive This is a value, measured in
seconds,
that the IP Deskphone
uses when a connection to the
server is established using TCP
or TLS. The IP Deskphone
periodically sends a packet to
the server, which contains a pair
of CRLF, to ensure the server is
responding.
30 Min: 5
Max: 1800
Register
Retry
When a connection failure
occurs, this value in seconds is
how long the IP Deskphone
waits before attempting to
reregister with the proxy.
30 Min: 30
Max: 1800
Register
Max Retry
After a failure to reconnect with
the proxy, the IP Deskphone
increases the amount of time
that it waits for the next
registration retry attempt. This
value, measured in seconds, is
the maximum value that the IP
Deskphone waits in between
retry attempts
1800 Min: 600
Max: 1800
SRTP
Secure
Real-time Transport Protocol (SRTP) encrypts the Real-time Transport Protocol (RTP)
traffic between two end-points to achieve full security for the media path.
Security Descriptions for the Session Description Protocol (SDESC) (RFC4586) defines a
mechanism to transmit the necessary cryptographic parameters between two end-points.
SRTP is initiated when Secure Real-time Transport Control Protocol (SRTCP) allows both
sides of a conversation to agree on the keys you can use to encrypt or decrypt the messages
that are transmitted.
Media security — SRTP
Secure RTP (SRTP) encrypts the media path between two end-points. After both end-points
agree on the necessary parameters to encrypt and decrypt audio packets, the voice path
between them is established.
SRTP is configured on the IP Deskphone to provide multiple levels of protection.
SRTP
SIP Software for Avaya 1200 Series IP Deskphones-Administration September 2013 285