Avaya one-X 9600 Series Administrator's Manual page 179

Media Encryption of the audio information exchanged between the IP telephone and the call
Channel server or far end telephone.
Encryption
NAPT Network Address Port Translation.
NAT Network Address Translation, a mechanism by which IP addresses are mapped from
one address space to another, and in which UDP and TCP port numbers may be
remapped to allow multiple devices to share the same IP address without port number
conflicts.
OPS Off-PBX Station.
PHP Hypertext Preprocessor, software used to assist in the format and display of Web
pages.
PSTN Public Switched Telephone Network, the network used for traditional telephony.
QoS Quality of Service, used to refer to several mechanisms intended to improve audio
quality over packet-based networks.
Refresh/ Use IKE to create a new SA with a new SPI.
Rekey
RSA Rivest-Shamir-Adleman; a highly secure asymmetric cryptography method developed
by RSA Security, Inc. that uses a public/private key pair. The private key is kept secret
by the owner and the public key is published, usually in a digital certificate. Data is
encrypted using the recipient's public key, which can only be decrypted by the
recipient's private key. RSA is very computation intensive, thus it is often used to
encrypt a symmetric session key that is then used by a less computationally-intensive
algorithm to encrypt protocol data during a "session". RSA can also be used for
authentication by creating a digital signature, for which the sender's private key is
used for encryption, and the sender's public key is used for decryption.
RSVP Resource ReSerVation Protocol, used by hosts to request resource reservations
throughout a network; applies to IPv4 audio connections only.
RTCP RTP Control Protocol, monitors quality of the RTP services and can provide real-time
information to users of an RTP service.
RTP Real-time Transport Protocol. Provides end-to-end services for real-time data such as
voice over IP.
SA Security Association, a security protocol (e.g., IPSEC, TLS) and a specific set of
parameters that completely define the services and mechanism necessary to protect
security at that security protocol location. These parameters can include algorithm
identifiers, modes, cryptographic keys, etc. The SA is referred to by its associated
security protocol (for example "ISAKMP SA", "ESP SA", "TLS SA").
SCEP Simple Certificate Enrollment Protocol, used to obtain a unique digital certificate.
SDP Session Description Protocol. A well-defined format for conveying sufficient
information to discover and participate in a multimedia session.
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