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ALLO PRI Gateway
User Manual V2.0
34
The public switched telephone network (PSTN) is the network of the world's public circuit-
switched telephone networks. Originally a network of fixed-line analog telephone systems, the
PSTN is now almost entirely digital, and now includes mobile as well as fixed telephones.
PPP
Point-to-Point Protocol
Type of communications link that connects a single device to another single device, such as a
remote terminal to a host computer.
PRI
Primary Rate ISDN
PSTN
Public Switched Telephone Network
A communications network which uses telephones to establish connections between two points.
Also referred to as the dial network.
PTMP
Point-to-Multipoint
A connection where data is broadcast between more than two endpoints.
PTP
Point-to-Point
A connection restricted to two endpoints.
RJ11
A six-pin jack typically used for connecting telephones, modems, and fax machines in
residential and business settings to PBX or the local telephone CO.
RJ45
8P8C, un-keyed modular connector type for Ethernet over twisted pair. Predominantly used in
LAN and uses Unshielded Twisted Pair cable.
RJ48
8P8C modular connector type for T1 and ISDN termination over twisted pair. While RJ45 and
RJ48 use the same connector, they differ in their wiring. RJ48 is commonly seen on T1 lines
and uses Shielded Twisted Pair cable.
SIP
Session Initiation Protocol
An IETF standard for setting up sessions between one or more clients. It is currently the leading
signaling protocol for Voice over IP, gradually replacing H.323.
T1
A dedicated digital carrier facility which transmits up to 24 voice channels (DS0s) and transmits
data at 1.544 Mbps. Commonly used to carry traffic to and from private business networks and
ISPs.
VoIP
Voice over Internet Protocol
Technology used for transmitting voice traffic over a data network using the Internet Protocol.