Net2Phone Max Series Sales Manual page 39

PSTN (Public Switched Telephone Network)
The PSTN is the worldwide telephone network.
Q
QoS (Quality of Service)
QoS is used to describe the level of service of a data communications system. As related to VoIP or IP Telephony, a QoS level
is normally compared to POTS quality.
R
Rack mounted
A rack mounted unit is one that is built into a cabinet with a standard panel width of 19 or 23 inches.
Real Time
Real time refers to communication where any perceptible delay is extremely minimal.
RJ-11 (Registered Jack-11)
RJ-11 refers to the physical connection utilized in standard analog phones. An RJ-11 connector holds either four or six wires
and connects an analog phone to a standard, home phone jack.
RJ-45 (Registered Jack-45)
RJ-45 is a telephone connector that holds up to eight wires and is commonly used in Ethernet devices.
RJ-48 (Registered Jack-48)
RJ-48 is a telephone connector with the same plug and socket as an RJ-45, but with different pin configurations. There are
different types of RJ-48 connectors. For example, the RJ-48C is commonly used with T-1 connections and the RJ-48S can be
utilized with 56 Kbps digital lines.
RTP/RTCP (Real time Transport Protocol/Real time Control Protocol)
RTP is an IP protocol that supports real time voice and video transmission, while RTCP is the companion protocol utilized to
maintain the QoS.
S
SLIP (Serial Line Internet Protocol)
SLIP is a communications protocol that was superseded by PPP.
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