What Is Talking Caller ID?

Signaling No. 7: Also called common channel signaling. That is, a signaling method for transmitting a group of voice channel signaling on a high-speed data link in a time division manner, which is usually used between offices. The No. 7 signaling system used in China is called the China No. 7 signaling system. The SS7 network is an out-of-band data communication network. It is superimposed on the operator's switching network and is an important part of the support network. Provides local, long-distance, and international automatic and semi-automatic telephone connections between fixed telephone networks or ISDN network offices; provides local, long-distance, and international telephone call services between exchange offices within the mobile network, as well as related mobile services, such as text messaging Services; provide intelligent network services and other value-added services for fixed and mobile networks; provide transmission and collection of operation management and maintenance information.

Signaling No. 7

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Number 7

In order to achieve

Number 7

Distinguished from the software level, No. 7

Number 7

Number 7

Signaling Session No. 7

One of the most basic applications of No. 7 signaling is to replace the old No. 1 to No. 6 signaling, which is used as inter-office signaling of modern digital program-controlled switches to control inter-office calls.

Signaling No. 7

Continued. Compared with the old inter-office signaling, No. 7 signaling has many advantages as an inter-office signal: high signaling transmission speed and short call connection time; large signal capacity, a 64kbps link can theoretically 10,000 channels; flexible and easy to expand; low interference on the channel, high quality of the channel; can transmit end-to-end signaling or user signaling; can make the channel service intelligent, even if the traditional telephone service has CLASS characteristic.

CLASS (Customer Local Area Signalling Services) represents a set of special telephone service features, including 13 functions such as automatic call back, automatic recall, user tracking, caller name transfer, and call selection acceptance. These functions or service features cannot be provided separately by the user's telephone.

800 Signaling No. 7 and 800

According to statistics, in 1993, the United States handled 80 million to 100 million 800 telephones per day, with an annual turnover of tens of billions of dollars, and an annual growth rate of 15-20%. Service 800 is a huge market that attracts various telecommunications companies and is one of their main revenues. The so-called 800 number is a special phone number provided by the company to the customer. The area code of the number is 800 (virtual area code). The customer will pay the cost of the call when using the phone with the company. . Phone number 800 is a virtual logical phone number. A company may have many actual phone numbers, but there is only one phone number 800. Customers may dial this number anywhere to request a call with a functional department of the company. A process of turning 800 calls into actual phone numbers. The implementation of this process depends on the SCP of the signaling network.

No. 7 signaling other pay phone

There are three forms of Alternate Billing Service (ABS): the first form is a credit card phone, which is different from the magnetic card phone currently in China (in English, the magnetic card phone is called debet card call); Pay bill (collect billing call or collect call); The third form is a third number billing call. Before the common channel signaling network was established, other payphones could only be implemented by telephone office operators. With the common channel signaling network, other payphones were basically automated, convenient and efficient.

Signaling Advanced Intelligent Network No. 7

Advanced intelligent network introduces two new nodes in the common signaling network: Adjunct and IP. Adjunct's function is similar to SCP. It directly connects to the program-controlled switch with SSP function, and provides them with a platform function of direct and fast database service and call processing. The administrator (or even the user) of the telephone office can use the platform function to design the telephone service features for their own switch. Of course, the software of the program-controlled switch must also be upgraded to AIN software.

In the AIN switch, a user's phone processing process is divided into many stages. After each stage, a trigger checkpoint is defined. The AIN switch software detects events generated by the switch at each checkpoint. Phone call processing is done jointly by the AIN switch and Adjunct (traditional call processing is done entirely in the switch). AIN performs general processing. When an event is detected at the checkpoint, the processing is submitted to Adjunct for completion. The work done by Adjunct can be designed by administrators using platform features in order to obtain different telephony service characteristics.

IP (Intelligent Peripherals) is a kind of network intelligent device. It is directly connected to the AIN switch. Its main function is speech recognition. If the network administrator defines the "speech recognition" feature at a breakpoint, then the user can use the voice to enter the called phone number. At this time, the AIN switch must send the voice number to the IP and translate it into a digital number before making subsequent calls. deal with.

No. 7 signaling cellular mobile communication

The cellular mobile communication system needs to add at least three nodes in the common signaling network: MSC, HLR and VLR. The cellular mobile communication system divides a communication area into many CELLs, and an MSC (Mobile Switching Center) is set up in each CELL, which is responsible for the communication of wireless users in the CELL. MSC is a wireless switch that uses SS7 signaling. It includes MTP, SCCP, TCAP and MAP in SS7 signaling. In a cellular mobile communication system, each wireless user must register in the database HLR (Home Location Register) and VLR (Visitor Location Register).

The cellular mobile communication system includes a number of signaling procedures, the two most important of which are: Registration and Intersystem

Signaling No. 7

Handoff / Intersystem Handback Register is a process for mobile users to register with the VLR automatically. When a mobile user crosses the boundary of two CELLs, communication processing is delivered by one MSC to another MSC. This is the Intersystem Handoff signaling process, and the Intersystem Handback signaling process.

The MAP protocol is still under development. At present, the protocol standard adopted by most manufacturers is the transition standard IS-41-B developed by EIA / TIA.

No. 7 signaling other applications

SS7 has broad application prospects. In addition to the above five applications, it can be used as internal signaling for ATM networks and B-ISDN networks. In addition, due to the expansion of the data communication network and the increase in technical complexity, the contradiction between network operation and maintenance, management, testing, and fault diagnosis has become increasingly prominent. The best way to solve this problem is to use the OMAP protocol of signaling number A network management and maintenance center is established in the signaling network. Because the signaling network is a fast and reliable packet switching network, operators of the network management center can perform remote, real-time testing, diagnosis, monitoring, control, and management of the communication network without interfering with normal data communications.