How to use the virtual network of telecom mobile phone

Central subscriber exchange, CENTREX for short. There is no switch installed at the user end, and the digital program-controlled switch of the telecommunications company directly provides all telephones to an enterprise or unit, making an enterprise internal virtual phone network, and the users in the virtual phone network have two telephone numbers. Virtual network users enjoy all the functions of the new program-controlled service of public network ordinary telephone.

Comparison of characteristics between virtual network service and PBX

trait

Virtual network service

Subscriber program-controlled exchange

The internal telephone has a free extension number in the network.

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Have an independent 7-digit external direct dial number.

You can dial in through a straight line number, and every phone can be connected to the fax machine.

Every phone can realize ADSL Internet access, and it can be personalized for property rights and apartment hotels.

Unable to achieve

Single machine enjoys new data service.

You can enjoy the data services provided on the public network at any time.

Limitation of copper wire and China No.1 signaling on data service and bandwidth service

The distribution of users in the group is not limited by region.

Users in this group of virtual switches can be distributed in different places in a telephone office area, that is, an enterprise group can realize internal communication between branches in different places or different buildings in a telephone office area through virtual switches, and can directly make internal calls to each other. Even some leaders' fixed telephones can be part of it, so home office is possible.

PBX is generally limited to one building.

Instant billing

Permission can be set, bills can be generated, and charging and control functions can be provided through the local exchange.

Call barring and billing functions are determined by PBX functions.

Intra-network telephone call prohibition

Call barring in the network can be realized (provided according to a certain proportion of installed capacity, generally not exceeding 20%).

Provided by PBX software.

operator function

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New functions of program-controlled services

It can open new functions of program-controlled services like ordinary program-controlled telephones.

not have

Software and hardware upgrade and maintenance

The telecommunications department is responsible, so don't worry about elimination. It is safe and reliable, and does not need additional investment. There is no problem of secondary investment.

A good switch needs strong technical support to ensure the normal operation of the equipment, and it needs to pay a certain maintenance premium regularly every year. Users and manufacturers need to invest a lot of money to solve the problem through consultation. The switch has a certain service life (generally 3-6 years), and the small switch has a service life and needs secondary investment.

Connection rate

High connection rate, "one machine two"

The low connection rate is limited by the number of trunk lines.

Capacity scalability

Unlimited expansion, no need to add equipment, comprehensive application of the latest technology, new functions and network-wide synchronization.

It can be expanded, but it needs big investment; Increase the number of hardware equipment and trunk lines

User investment

Free installation of telephone lines; Pay the monthly fee to the telecommunications department according to the number of single machines, and settle the phone bill according to the number of single machines, without having to undertake the daily maintenance of the equipment.

Each switch 1000 yuan or so; Configure trunks according to the exchange capacity of 10: 1, pay the monthly fee according to the number of trunks, pay the maintenance fee according to the number of extensions, settle the telephone bill according to each trunk, and undertake daily maintenance by itself; Trunk line 100 yuan/station/month.

progress

Easily connect modern equipment such as Internet, ISDN, videophone and graphic communication, and keep up with the development of telecommunication technology. Reduce the management cost and leadership energy of enterprises.

Modern equipment such as Internet, ISDN, videophone and graphic communication can be realized, but it is necessary to upgrade software or install hardware equipment such as relay board. Increased the management cost and leadership energy of enterprises.