gsm VoIP gateway

Select The Right VoIP Gateway

If you’re responsible of fixing VoIP on your organization’s network, selecting the proper gateway may be a crucial a part of the method. Deb Shinder explains the role that VoIP gateways play and discusses a number of the factors you would like to require into consideration to settle on the proper one.
Of all the “pieces” of a business-level VoIP system, gateways could also be the smallest amount understood. If you’re responsible of fixing VoIP on your organization’s network, selecting the proper gateway may be a crucial a part of the method.
But before you create a choice , you initially got to understand what this component does, how it works, and a few of the choices that are available. Let’s look at the role VoIP gateways play and discuss some of the factors you need to take into consideration to choose the right one.
As most IT professionals know, a gateway may be a device that gives a connecting point from one network to a different . Gateways often act as transition points between networks that use different protocols — performing the interpretation tasks necessary for devices on either side to speak with each other .
In the case of VoIP, a gateway is important to permit calls to travel between the VoIP network and therefore the public switched telephone network (PSTN). Without the gateway, users on a VoIP network can’t make or receive calls to and from “outsiders” with traditional phone lines.
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VoIP gateways also are necessary to translate between systems using different VoIP protocols (for example, between a SIP network and one that uses H.323). There also are VoIP-to-GSM and VoIP-to-CDMA gateways that route VoIP calls on to Global System for Mobile communication (GSM) or Code-Division Multiple Access (CDMA) mobile numbers without browsing the PSTN network (and thus in some cases incurring additional charges).
Hardware vs. software gateways
Like other gateway products like routers and firewalls, we will divide VoIP gateways into two categories: software-only gateways and so-called “hardware” gateways. I say “so-called” because, of course, every gateway consists of both software and hardware.
The distinction is between gateway software that runs on a standard network operating system (such as Windows or Linux) and a gateway product sold as an “appliance” with the software preinstalled on the hardware’s (often proprietary) OS. Even if the gateway appliance runs on a more general OS, that OS nearly always serves just one purpose — running the gateway software — and you cannot install other applications on it.
It’s less costly to shop for a software program only, and you’ll be ready to install it on equipment that you simply have already got. You may even be ready to run the gateway software on a server running other services or applications, but there are security issues with doing so.
It’s usually easier to upgrade the hardware that a software-only gateway runs on since it tends to be a typical PC running a typical OS. That means you can relatively easily add more RAM or a faster processor if you find you need it. Appliances may or might not be upgradeable and should require that you simply use special non-standard (and more expensive) components if you are doing upgrade them.
Because it runs on a typical OS, you’ll be ready to more easily monitor and manage the software gateway machine using an equivalent network administration tools that you simply use for other PCs on the network.
On the opposite hand, gateway appliances offer some real benefits. Here are some advantages of gateway appliances:
Appliances are often sold as “turn-key” solutions; you do not need to spend time installing the software — and troubleshooting problems that occur during installation. If the OS is proprietary, an equivalent vendor will likely support the hardware, OS, and gateway software.
Because the appliance is devoted to one task (VoIP gateway), you’ll optimize it for the simplest possible performance of that task. There won’t be other OS services running thereon that slow it down.
If the appliance runs on a proprietary OS, it’s likely to be easier to secure than a PC running a standard network OS. Even if it runs on a typical OS, the seller will have already removed unnecessary services and locked it right down to make it safer.
Factors to consider
Call load: it is vital to form sure the gateway you decide on can handle the number of VoIP calls that will get to undergo it. Calculate the number of expected incoming and outgoing calls that users will make simultaneously at peak times — and then add 20 to 25 percent VoIP call signaling
VoIP protocol support: The two most popular VoIP call signaling protocols are the Session Initiation Protocol (SIP) and H.323. Your gateway must support the protocol employed by your network’s VoIP system.
Compatibility: you would like to make sure that the ports on the gateway are compatible with those on your private branch exchange (PBX)