Avaya 4600 Manuel D’Utilisation

LLDP 

Link Layer Discovery Protocol. All IP Telephones with an Ethernet interface support 
the transmission and reception of LLDP frames on the Ethernet line interface in 
accordance with IEEE standard 802.1AB.

MAC 

Media Access Control, ID of an endpoint.

Media 
Channel 
Encryption 

Encryption of the audio information exchanged between the IP telephone and the call 
server or far end telephone.

NAPT 

Network Address Port Translation.

NAT 

Network Address Translation.

OPS Off-PBX 

Station.

PAE 

Port Access Entity. The protocol entity associated with a port. The PAE supports the 
protocol functionality associated with the authenticator, supplicant, or both.

PHP 

Hypertext Preprocessor, software used to assist in the format and display of Web 
pages.

PoE 

Power over Ethernet. 

PSTN 

Public Switched Telephone Network, the network used for traditional telephony.

Quality of Service, used to refer to several mechanisms intended to improve audio 
quality over packet-based networks.

A SIP server that accepts REGISTER requests. The Registration Server places the 
information received in the requests into the location service for the domain the 
server handles.

RSVP 

Resource ReSerVation Protocol, used by hosts to request resource reservations 
throughout a network.

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.

SDP 

Session Description Protocol. A well-defined format for conveying sufficient 
information to discover and participate in a multimedia session. 

Signaling 
Channel 
Encryption 

Encryption of the signaling protocol exchanged between the IP telephone and the call 
server. Signaling channel encryption provides additional security to the security 
provided by media channel encryption.