CN109842729A

CN109842729A - A kind of exchange trunk call filter method

Info

Publication number: CN109842729A
Application number: CN201811533716.2A
Authority: CN
Inventors: 谢作健; 赵阔; 倪挺; 周宇勤; 胡浪
Original assignee: Jiangsu Qian You Information Technology Co Ltd
Current assignee: Jiangsu Qian You Information Technology Co Ltd
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2019-06-04

Abstract

The invention discloses a kind of exchange trunk call filter methods, including trunk call filter plant, the trunk call filter plant is respectively equipped with the simulation outside line connecting with outside line public switched telephone network, and the trunking port being connect with scheduling switch, public switched telephone network issues call request to scheduling switch by simulation outside line first, and intelligent filtering module carries out judging whether to establish communication connection to dialing number information；The dialing number information is finally updated by backup according to strategy.Exchange trunk call filter plant of the invention has the function of white and black list, carries out interception filtering to useless calling or harassing call for realizing, while protecting the communication of urgent call unimpeded, and the priority for optimizing urgent call is attended a banquet connection.

Description

A kind of exchange trunk call filter method

Technical field

The invention belongs to technical field of electric power communication more particularly to the interception tune of electrically powered telephone system external net call request Spend strategy process.

Background technique

Power dispatching telephone system is one of most important system of power telecom network, and system call and effective may be implemented in it Ground commander's production.For power dispatching telephone, it is desirable that have high reliability, not only under normal circumstances, but also severe Under weather conditions and when accident occurs for electric system, it is also necessary to guarantee dispatching telephone failure-free operation.Guaranteeing height reliability While, dispatching telephone must also be ensured that high degree of availability, when encountering customer trouble Shen announcement or emergency occurs, can guarantee It is unobstructed to dispatch system telephone.

Since the outside line resource that phone dispatches system and public network (PSTN) connection is limited, and subscriber complaint phone is often logical It crosses outside line access in dispatch system to contact with failure admissibility staff, so preventing useless to guarantee that limited outer line passage is unimpeded Active channel is called, needs external line passage call request to be intercepted and filtered, while protecting urgent call and scheduling seats Communication it is unimpeded.

Summary of the invention

In view of the deficiencies in the prior art and technical problem, the present invention provides a kind of exchange trunk call filtering sides Method.

In order to solve the above technical problems, the invention adopts the following technical scheme: a kind of exchange trunk call filter method, It is characterized in that, including trunk call filter plant, the trunk call filter plant is respectively equipped with to be connected with outside line public switched telephone network The simulation outside line connect, and the trunking port of E1 and SIP trunk agreement are connect and supported with scheduling switch, the telephone relay Filtration step includes:

S1. public switched telephone network issues call request, trunk call filter plant tune to scheduling switch by simulation outside line With intelligent filtering module, the dialing number information of call request route is extracted；

S2. intelligent filtering module judges dialing number information, if dialing number information and intelligent filtering module In blacklist be consistent, then carry out intercepting and on-hook processing；If the white name in dialing number information and intelligent filtering module It is single-phase to meet, then enter scheduling switch；

S3. when dialing number information in intelligent filtering module white list or blacklist do not meet, intelligent filtering mould Call request is transferred to Voice Mailbox called number or third party and bypasses telephone line by block, and according to strategy by the calling number Information is updated backup.

Preferably, in step S1, spread F XO and 4WEN are supported in the simulation outside line of trunk call filter plant.

Preferably, the scheduling switch supports PBX and IPPBX.

Further, in step (2), the white list is classified dialing number information according to priority, scheduling switch Calling number is preferentially established with idle seating and is communicated to connect, when there is no idle seating, according to calling number priority orders, It cuts off by force and occupies online lowest priority and attend a banquet communication path.

The utility model has the advantages that exchange trunk call filter plant of the invention has the function of white and black list, for realizing Interception filtering is carried out to useless calling or harassing call, while protecting the communication of urgent call unimpeded, optimizes the excellent of urgent call First grade is attended a banquet connection.

Detailed description of the invention

Fig. 1 is the communication network topology schematic diagram of trunk call filter plant of the present invention；

Fig. 2 is the logical flow diagram of exchange trunk call filter method of the present invention；

Fig. 3 is E1 digital relay interface input impedance characteristic curve described in the embodiment of the present invention.

Specific embodiment

Combined with specific embodiments below and attached drawing, invention is further described in detail.

As shown in Figure 1, exchange trunk call filter method of the invention, including trunk call filter plant, the relaying Call filtration equipment is respectively equipped with simulation outside line that is connecting with outside line public switched telephone network and supporting FXO and 4WEN, and with tune Degree interchanger connects and supports the trunking port of E1 and SIP trunk agreement, and the scheduling switch supports PBX and IPPBX, described Telephone relay filtering can carry out white and black list setting by network management, differentiate to each number from outside line incoming call, The incoming call for meeting white list number directly passes through exchange trunk call filter plant and enters scheduling programme-controlled exchange, realizes electricity Words communication, and the verification for having carried out blacklist and plain old telephone to incoming call is handled, workflow:

The simulation outside line of trunk call filter plant of the invention is supported and spread F XO and 4WEN, with scheduling switch Trunk interface meet and support E1 and Session Initiation Protocol, it is with the following functions:

1. having at least 4E1 trunk interface, it can be configured to outside line or interior lines relaying；

2.E1 relaying supports No.1, SS7, PRI, V5 agreement；

3. supporting the simulation outside line relaying such as spread F XO, 4WEM；

4. interior and exterior lines is supported to pass through the Session Initiation Protocol networking of standard；

5. have network management configuration interface, can alarm to equipment, trunk protocol, black and white lists be managed configuration；6. net Interface tube type is Ethernet or RS232 interface；

7. 19 " rack-mounted device of standard；

8. power supply is AC220 or DC-48V.

Particular technique index is as follows:

1) technical requirements

Bit rate: 2048Kbit/s ± 50 × 10-6

Pattern: HDB3 code

Time slot: 30/32

2) opering characteristic of electric apparatus

Input port:

Input impedance nominal value: 75 Ω (coaxial pair)

Input impedance characteristic:

Input signal: 2048kbit/s interface input port pair should be normally received to nominal value decaying 0~6dB (1024KHz) Input the minimum tolerance of digital dither signal and drift.

Claims

1. a kind of exchange trunk call filter method, which is characterized in that including trunk call filter plant, the trunk call Filter equipment be respectively equipped with the simulation outside line connecting with outside line public switched telephone network, and connect and support with scheduling switch E1 and The trunking port of SIP trunk agreement, the telephone relay filtration step include:

S1. public switched telephone network issues call request to scheduling switch by simulation outside line, and trunk call filter plant calls intelligence Energy filtering module, extracts the dialing number information of call request route；

S2. intelligent filtering module judges dialing number information, if in dialing number information and intelligent filtering module Blacklist is consistent, then carries out intercepting and on-hook is handled；If dialing number information and the white list phase in intelligent filtering module Meet, then enters scheduling switch and scheduling seats are established and communicated to connect；

S3. when dialing number information in intelligent filtering module white list or blacklist do not meet, intelligent filtering module will Call request is transferred to Voice Mailbox called number or third party and bypasses telephone line, and according to strategy by the dialing number information It is updated backup.

2. exchanging trunk call filter method according to claim 1, it is characterised in that: in step S1, trunk call filtering Spread F XO and 4WEN are supported in the simulation outside line of equipment.

3. exchanging trunk call filter method according to claim 1, it is characterised in that: the scheduling switch supports PBX And IPPBX.

4. exchanging trunk call filter method according to claim 1, it is characterised in that: in step (2), the white list is pressed Dialing number information is classified according to priority, calling number is preferentially established with idle seating and is communicated to connect by scheduling switch, when When there is no idle seating, according to calling number priority orders, cut off by force and occupy online lowest priority attend a banquet communicate it is logical Road.