Sophisticated network signaling system that utilizes out-of-band signaling where signaling information is sent over a separate channel than the call itself; improves call processing set-up times and frees circuits for voice, data and video transmissions.
A digital data network carrying signaling information that interfaces with the telephone company voice/data network for services using the American National Standards Institute (ANSI) Common Channel Signaling (CCS7) protocol. Also known as CCS/SS7.
A global standard for telecommunications defined by the International Telecommunications Union (ITU). This standard defines the procedures and protocol by which network elements in the public switched telephone network ( PSTN) exchange information over a digital signaling network to effect wireless (cellular) and wireline call setup, routing and control. Signaling system 7 is an example of out-of-band CCS. (source)
Packet switching network protocol used between intelligent nodes in the PSTN to provide signaling to establish and disconnect calls (and other related services including 800 number translation caller ID store and forward ring back concurrent data etc.).
A protocol used by phone companies. Has three basic functions: Supervising, Alerting and Addressing. Supervising monitors the status of a line or circuit to see if it is busy, idle, or requesting service. Alerting indicates the arrival of an incoming call. Addressing is the transmission of routing and destination signals over the network in the form of dial tone or data pulses.
The designs efficient signaling method available, SS7 uses a single channel to carry signals for multiple circuits.
The current international signaling standard for all digital exchanges with integrated services. The SS7 network allows call control and transaction messages from the integrated voice and data network to be transferred on communications paths that are separate from the voice and data connections. It delivers out-of-band signaling that provides fast call setup by means of high-speed, circuit-switched connections and transaction capabilities which deal with remote database interactions. SS7 also plays an integral role in the deployment of ISDN. The SS7 protocol consists of four basic sub-protocols: Message Transfer Protocol (MTP) - Provides functions for basic routing of signaling messages between signaling points. Signaling Connection Control Part (SCCP) - Provides additional routing and management functions for transfer of messages other than call setup between signaling points. Integrated Services Digital Network User Part (ISUP) - Provides for transfer of call setup signaling information between signaling points. Transaction Capabilities Application Part (TCAP) - Provides for transfer of non-circuit related information between signaling points.
The international data network and signaling protocols that control the PSTN voice circuits and calls, ensuring that calls are set up securely and efficiently. Although SS7 is an international telecommunications standard, it has country-by-country variations.
A protocol for addressing calls.
Signaling System 7 (SS7) is an architecture for performing out-of-band signaling in support of the call-establishment, billing, routing, and information-exchange functions of the public switched telephone network (PSTN).
Signaling System #7 (SS7) is a set of telephony signaling protocols which are used to set up the vast majority of the world's public switched telephone network telephone calls.