What are the differences between China Signaling No. 1, Signaling No. 7 and PIR Signaling?

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The difference between China’s Signaling No. 1 and Signaling No. 7

2010 Thursday, July 15th, 09:36

The difference between China’s Signaling No. 1 and Signaling No. 7

First, conceptual description

Signal No. 1 Command: Also known as multi-frequency mutual control signaling or channel associated signaling. Channel-associated signaling refers to a signaling method in which signaling and voice are transmitted in the same session. The No. 1 signaling system used in our country is called China No. 1 signaling system. It is the earliest signaling commonly used in domestic PSTN networks.

Signaling No. 7: also known as public channel signaling. That is, a signaling method that transmits a group of session signaling on a high-speed data link in a time-division manner. It is usually used between offices. The No. 7 signaling system used in our country is called China No. 7 signaling system. The SS7 network is an out-of-band data communication network that is superimposed on the operator's switching network and is an important part of the support network. Complete local, long-distance and international automatic and semi-automatic call connections between fixed telephone networks or ISDN network offices; provide local, long-distance and international telephone call services between exchange offices within the mobile network, as well as related mobile services, such as text messages, etc. Services; provides intelligent network services and other value-added services for fixed and mobile networks; provides transmission and collection of operation management and maintenance information. The No. 7 signaling network is roughly composed of the following parts. The signaling point is the node that processes control messages in the SS7 signaling network. The signaling point that generates the message is the source signaling point of the message. The signaling point that receives the message is The destination signaling point of the message. There are the following three types of signaling points: 1. Service Switching Point (SSP) The service switching point is the generation or termination point of signaling messages. It is essentially the local switching system (or switching center CO), which initiates calls or receives incoming calls. 2. Signal Transfer Point (STP) completes the function of a router, checks the messages sent by the SSP, and then exchanges each message to the appropriate place through the network. STP connects other signaling points and networks together to form a larger network. 3. Service Control Point (SCP) is a typical access database server. SCP is the control center of intelligent network services. It is responsible for the execution of business logic, provides call processing functions, receives query information and query database sent by SSP, and authenticates to SSP. Issue call processing instructions, receive the bill generated by SSP and process it accordingly. In the No. 7 signaling network, the ISUP signaling (ISDN USER PART) message is used to establish, manage and release the voice trunk circuit between the central office voice switches, and provides the information exchange required for voice and non-voice services. To support basic bearer services and supplementary services, for example: ISUP signaling messages can carry the calling ID, calling party's phone number, user name, etc. TCAP signaling (Transaction Capabilities Application Part) messages are used to support telephone services, such as toll-free calls, local number portability, card services, mobile roaming and authentication services. TCAP mainly includes the mobile application part (MAP) and the operation, maintenance and management part (OMAP). MAP stipulates procedures such as roaming and channel cross-office transfer in mobile services, while OMAP only provides formal testing procedures for MTP routing and SCCP routing.

Second, Feature Description

I. Introduction to No. 7 Signaling (No. 7 Signaling)

Group Telephone

No. 7 The signaling (No. 7 signaling) system is an international standardized general public signaling system. Its basic characteristics are:

1. It is most suitable for digital program-controlled switches and digital transmission equipment. Comprehensive digital network.

2. It can meet the current and future requirements for transmitting call control, remote control, maintenance and management signaling and transaction processing information between processors.

3. The signaling transmission is quite reliable.

NO.7 signaling can meet the requirements of a variety of communication services. The current applications are mainly:

1. Telephone network communication between offices.

2. Data network communication between offices.

3. Comprehensive business digital network between offices. (For example: ISDN PRI)

4. It can transmit various information in the mobile communication network.

5. Support various types of intelligent services.

6. Telephone network and data network communication between the central office and the user end.

2. Overview of NO.7 signaling

*** channel signaling is a new signaling method that has emerged with the widespread application of digital program-controlled switches. It concentrates the control telephone connection signaling that was originally scattered in various channels and transmits it in one voice channel, and uses labels to distinguish the signals of each channel. Broadly speaking, *** channel signaling, the signaling link that transmits signaling and the conversation channel are separate. Generally, it is applied between digital program control bureaus, and due to the influence of coding resources, there is no client promotion. Since it uses a direct code sending method, the transmission rate is faster than NO:1 signaling.

Advantages: The signaling transmission speed is fast, which greatly shortens the call connection time; signaling and voice are transmitted separately, which brings great flexibility to change signaling and increase signaling.

Disadvantages: Limited by signaling point encoding resources, it cannot be promoted on a large scale.

Physical interface: complies with G.703 recommendations

Unbalanced 75 ohm BNC

Frame structure: complies with G.704 recommended frame structure and G.706 recommendations Multiframe structure

Signaling standard: NO