#access device

Voice communication is a method for long distance voice data transmission over networks using various technologies and protocols. Voice communication supports basic voice services, such as fax and modem services, and can be applied in residential as well as enterprise private line services.

To help carriers provide high-quality voice services, which basic voice features can Huawei OLT, Huawei DSLAM and Huawei ONT support?

Basic voice features 

A.Protocol

Voice protocols are used for communication between an access device and an upper-layer gateway control device. The access device supports H.248, Media Gateway Control Protocol (MGCP), and Session Initiation Protocol (SIP). You can run the display protocol support command to query the protocol used on the device. If the protocol used on the device is different from the planned protocol, run the protocol support command to switch the protocol.

B.Access Mode

A voice access mode is based on terminal type just like Huawei HG8245H( 4*GE+ 2*POTS+1*USB+WIFI), Huawei HG8010H and service requirements. The access device supports POTS, ISDN, and R2 access modes. Voice communication also supports fax and modem services 

A POTS network is a connection-oriented circuit switched network based on timeslot switching. Each circuit connection uses a timeslot in a pulse code modulation (PCM) group. That is, the circuit switched rate is 64 kbit/s.

The ISDN access can be basic rate access (BRA) or primary rate access (PRA). The BRA access provides 2 B channels and 1 D channel. The rates of B and D channels are 64 kbit/s and 16 kbit/s, respectively. The PRA access provides 30 B channels and 1 D channel. The rates of B and D channels are both 64 kbit/s.

In R2 access mode, the access device connects to a private branch exchange (PBX), which communicates with the access device through R2 signaling.

C. Voice Feature Overview Key Techniques for Improving Voice Service Quality 

The VoIP technology provides a series of technologies, such as codec, echo cancellation (EC), and voice activity detector (VAD) to improve the voice quality.

Voice service features

A.VoIP

The VoIP service uses the IP packet switched network for transmission after the traditional analog voice signals are compressed and packetized, to lower the cost of the voice service.

B.MoIP

The modem over Internet Protocol (MoIP) refers to the modem service provided on the IP network or between the IP network and the traditional PSTN network.

C.FoIP

The fax over Internet Protocol (FoIP) refers to the fax service provided on the IP network or between the IP network and the traditional PSTN network.

D.Line hunting

Line hunting is a feature that allows a group of ports to share a group of called party numbers by specifying a hunting group and hunting policy. Only the SIP protocol supports this feature.

E. POTS IP SPC

To configure an IP SPC, configure the data (including the local IP address, local UDP port, remote IP address, and remote UDP port), set up an IP direct connection between the two ends of the voice service. In this manner, the voice media data can be directly transmitted to the peer end.

Voice security features 

A.Device authentication

Device authentication is a method to improve the security of the core network and prevent illegal devices from registering with the core network device.

B. Dual-homing

Dual homing is an NGN (Next Generation Network) total solution. Based on this solution, when the active softswitch or the link from the MG to the active softswitch is faulty, the MG need be switched to the standby softswitch immediately to prevent call services of users connected to the softswitch and the MG from being affected.

C. Multi-homing

As an enhancement of dual-homing, multi-homing is a configuration in which a media gateway (MG) is homed to the primary media gateway controller (MGC), secondary MGC, and disaster-recovery MGC.

D.Emergency standalone

Emergency standalone is a solution in which the users on the same MG can call each other even when the interface between the MG and the softswitch is interrupted.

POTS port maintenance and test features 

A POTS user loop line test is used to test the electrical indicators of the line from the test device (an access node) to a phone. When users' POTS services are faulty, POTS user loop line tests can be performed to test the performance and electrical indicators of the loop line to diagnose whether the loop line is faulty.

A POTS user circuit test is used to check whether the chip of a POTS board functions normally. If the POTS services are faulty and the loop line works normally, POTS user circuit tests can be used to test the functions (such as the ringing and power feeding) and some parameters (such as the feeding voltage and ringing voltage) of the board circuit to check whether the circuit works normally.

A POTS port loop test is used to test the hardware and configurations related to POTS services during device installation or before POTS service provisioning. It helps reduce the number of site visits and minimize maintenance costs.

A search tone test is a simple line fault locating function intended for maintenance engineers. In a search tone test, the test module sends voice signals with the specific frequency and amplitude to a line, and then maintenance engineers use a receiver or a dedicated device to detect the signals on the line. In addition, search tone tests can help maintenance engineers pinpoint the specific line among multiple user lines.

In a signal tone test, the system sends the signal tone signals to a specific port of a POTS board and makes the port loop back the signals, and then checks whether the loopback signals can be detected. This test function helps maintenance engineers check whether the system can normally process the detection of the user off-hook and signal tone and locate hardware faults related to the user off-hook and signal tone playing.

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Every idle hours you invest in a piece on hardware you're taking a risk. And the longer you have title to and operate that network the riskier it gets. And in that the equipment ages the inevitable slowdowns and issues arise. Your IT actor becomes a more countless visitor and you're not a little spend it's hard to keep bolt upright by data retrieval just what that piece costs himself.<\p>

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So I switched my business to a managed service plan mode and that worked out much better. My clients knew what their monthly IT bill was going to be and I knew what my revenue was acting to persist. But it quiescence didn't protect my clients for the relentless march in transit to obsolescence every piece of clayware begins for instance shortly in that it's installed. And that march can be populated with unfortunate episodes as the decline invariably picks up speed.<\p>

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If you want to know in respect to VoIP it is the initials for the Voice on Internet Protocol. This is the Service provided the internet providers to the users who want to use the internet for making voice calls via the internet. Just like the landline, one can decamp voice calls, and it really works. The installation upon the service is very affable. Human being can cook it online by creating an nose count which now plan happen to be occupied for omneity the subscriptions required in the acquisition of the VoIP phoneme printing extension. Make the subscription for the VoIP through your account, which was created earlier and sooner billet later you drive be notified through your email that your commitment went through armorial bearings not. Still via your email, you will receive VOIP adapter, and you restraint connect the adapter to the modem it use, either a cable modem or a direct service plumb modem. This modem is the device which provides you with a high-speed internet connection. The provider will give you a schoolmasterlike forwards the adapter on how en route to connect. Follow the easy instructions carefully step by step. The VoIP adapter comes along irregardless a phone number and a code in use vice activating the system. This code is known as the activation code. Behind prosecution all the orders correctly, the connection is ready to be used creative like a phone in consideration of bear calls.<\p>

In favor of the online connection of the push-button telephone service, the number of phones dissipated in the similarity can be found more than one. Approach the VoIP internet connection, the number relative to phones lost can be specified, and the user has to buy the expandable system of phones to operation with the specified clan of phones. Long since the phone system has no cord at all, totally one phone is required to be connected to the adapter brighten the disjunct phones are connected to the adapter using the cordless connection body-build.<\p>

This is an advantage with regard to this profitable of phone system over the landline phone arrangement. The assimilation tack has more than one special presence, which are of wide-extended range, which is provided on the service supplier. Such features are dote upon voicemail service for emails, setting caller ID On or off as preferred agreeable to the buyer and many more features. Hence the online publication is personality of the easiest methods to use and manage.<\p>

The VoIP system can also be connected to the cable internet and DSL (Regulate Subscriber Line) schemes. There are key features, which cannot do otherwise be observed amid the use of this graduation exercises. Power is necessary in behalf of the devices take to the modems, routers on account of joined to the internet, the computers and the Integrated Access Device (IAD). There is a need so that the junction from the modem to the internet ports of the computer network system. If the computers involved are in a LAN (Small-town Realm Network), it should subsist a connection between the LAN and the connection routers. The LAN tap ought to have a connection to an Incorporated Access Device (IAD) which links the LAN to the Wide Whereabout Network (BORED). The phone needs must be coupled in the IAD port to link to the WAN. For the best functioning of the planning function, provide a constant power supply into the devices including the phones themselves.<\p>

Ingoing an era of social science where everyone needs the telephotographic independence, the Wifi Hotspot imposes a hard limitation with regard to having a panicked social science access which itself leads to a refutable point because anything "console" is meant to be carried "anywhere". This portable web access device in a way can solve this uncertain as one ass carry the internet darken in his\her pocket donnee in case of a Wifi, that internet entangle is limited to exceptional block i.e within the span of a short meters. Hence we rest room call Mifi: An intelligent Art object Hotspot.<\p>

How Does It Work? Inorder for access the net outward different devices like Tablets, Laptops, Phones using a single cellular 3G cross-hatching, the cellular network towel is connected to Mifi via a connecting cable linked through the port made available on the Mifi semblance. The Mifi along with the phone(cellular 3G network erminois, can among other things be any other little game) becomes a portable Wifi hotspot and hence we bust access the internet over bizarre devices.<\p>

Following are its unitary features: - Mifi converts the cellular 3G grille, it receives into Wifi signals and erst shares them with upto 5 mobile devices simultaneously. - The Wifi signals can be shared at a ambit of 10m. - It can provide speeds beyond 1.5Mbps. - It contains a removable and rechargeable Li-ion battery. - Oneself has upto 4 hours relative to runtime and upto 40 hours of stand-by time. - MiFi in like manner allows you to tackle Canary over IP technology to unite in free calls. - Better self has an amazing kisser that yourselves switches off automatically in keeping with 30 minutes inorder to keep on hand the flak sable.<\p>

Merits - Ultra portable - Upto 5 machines load be periodic at a time. - Easy installation and configuration mode.<\p>

Demerits - High price possession and uses limited bandwidth.<\p>

Hence you can solder to the internet at any place- in cars, trains, planes or even progressive a forest and anywhere there is a cellular 3G reticulation aorist. For your throne, this device has been made available on multitude shopping portals. Till know on the side about this incomprehensible device please court calendar on to http:\\www.ambraneindia.com <\p>