Point Code
Encyclopedia
An SS7
point code is similar to an IP address
in an IP network. It is a unique address for a node (Signaling Point, or SP), used in MTP layer 3
to identify the destination of a message signal unit (MSU).
In such a message you will find an OPC (Originating Point Code) and a DPC (Destination Point Code); sometimes documents also refer to it as a signaling point code. Depending on the network, a point code can be 24 bits (North America, China), 16 bits (Japan), or 14 bits (ITU standard, International SS7 network and most countries) in length.
ANSI
point codes use 24 bits, mostly in 8-8-8 format.
ITU
point codes use 14 bits and are written in 3-8-3 format.
Fourteen bit point codes can be written in a number of formats. The most common formats are decimal number, hexadecimal number, or 3-8-3 format (3 most significant bits, 8 middle bits, 3 least significant bits).
Twenty-four bit point codes are written in one of decimal, hexadecimal, or 8-8-8 format.
SS7
SS-7 can stand for:* Signaling System #7, a set of telephone signaling protocols.* The R-16 missile, with NATO reporting name SS-7 Saddler.* China Railways SS7, an electric locomotive model in China.* Super Socket 7, a chip socket introduced by AMD...
point code is similar to an IP address
IP address
An Internet Protocol address is a numerical label assigned to each device participating in a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing...
in an IP network. It is a unique address for a node (Signaling Point, or SP), used in MTP layer 3
Message Transfer Part
The Message Transfer Part is part of the Signaling System 7 used for communication in Public Switched Telephone Networks. MTP is responsible for reliable, unduplicated and in-sequence transport of SS7 messages between communication partners....
to identify the destination of a message signal unit (MSU).
In such a message you will find an OPC (Originating Point Code) and a DPC (Destination Point Code); sometimes documents also refer to it as a signaling point code. Depending on the network, a point code can be 24 bits (North America, China), 16 bits (Japan), or 14 bits (ITU standard, International SS7 network and most countries) in length.
ANSI
Ansi
Ansi is a village in Kaarma Parish, Saare County, on the island of Saaremaa, Estonia....
point codes use 24 bits, mostly in 8-8-8 format.
ITU
Itu
Itu is an old and historic municipality in the state of São Paulo in Brazil. The population in 2009 was 157,384 and the area is 641.68 km². The elevation is 583 m. This place name comes from the Tupi language, meaning big waterfall. Itu is linked with the highway numbered the SP-75 and are flowed...
point codes use 14 bits and are written in 3-8-3 format.
Fourteen bit point codes can be written in a number of formats. The most common formats are decimal number, hexadecimal number, or 3-8-3 format (3 most significant bits, 8 middle bits, 3 least significant bits).
Twenty-four bit point codes are written in one of decimal, hexadecimal, or 8-8-8 format.
Abbreviations
- OPC Originating Point Code
- DPC Destination Point Code
- ISPC International Signaling Point Code