VoIP FREQUENTLY ASKED QUESTIONS
What is the Gamlot VoIP Solution?
Voice over Internet Protocol (VoIP) is a technology that makes it possible to transmit and receive voice signals through a computer network. The voice signals are converted into a format that can be transmitted over a computer network or the Internet. This makes it possible to have telephone conversations over any IP network
How does VoIp work?
VoIP works on the principle of converting normal sound signals (analogue) into data packets (digital) in a format that can be carried over an IP network as data. Once carried over the IP network the data packets are converted back to sound signals for the other person to hear. During a conversation, the speech (voice signals) entering VoIP device A is converted to data packets, sent over the Internet (IP Network) to VoIP device B where it is converted back to voice signals.
How Do I Benefit From VoIP?
The greatest benefits are convenience, features and cost. Any VoIP device always gives the user more features and uses than normal analogue telephones e.g. call forward, call divert, voice messaging and management functions. Due to the fact that VoIP uses an IP network, you immediately save on costs as there is only one network to maintain. An additional benefit is that calls made from one VoIP device to another, is free.
What Is An IP Network?
An IP network is a type of computer network that makes use of the IP protocol to pass information (data) from one device to another by dividing it into small packets. the small packets are assembled at the other end for the device to process. A good example of an IP network is the Internet..
What Is Needed For My VoIP Device To Work?
There are only two basic requirements for your VoIP device to work. The first is that you must register for a unique Buzz number and the second is that you need Internet connectivity. .
What Is QOS?
Quality of service (QOS) is a method of controlling the behavior of a computer network. The idea is to priorities certain types of data traffic like voice traffic over other types of traffic e.g. e-mail in order to improve the quality of the voice call in progress. It boils down to ensuring that a data packet sent from one computer reaches the other computer within a certain amount of time. This time is measured in milliseconds.
What Kind Of Quality Can I Expect From The Internet Or IP Telephony
In most cases the quality will be better than that of a normal telephone due to the fact that digital technology is used. The actual quality of the call is greatly influenced by the condition of the IP network that carries the call. A bad (congested) IP network will decrease call quality. A well planned and maintained network will always ensure good quality.
Is the Quality Of My Voice Call Guaranteed?
The quality of any VoIP call can only be guaranteed in cases where proper IP network management and quality of service (QOS) policies are implemented. These network management and QOS policies can only be implemented by entities that have full control over the entire IP network. In most cases the quality will not be guaranteed as the call passes through different IP networks e.g. from the calling party's network through the public Internet to the called party's network. Due to the technology invested into the Gamlot VOIP solutions, the user will in most cases enjoy good call quality.
Can I Use VoIP Devices That I Purchased From Other Suppliers?
No, only VoIP devices tested & supplied by Gamlot will work on the Gamlot network.
What Internet Connections Will Your Products Work On?
Gamlot products can work on any Internet connection that you can use to browse the Internet or send and receive e-mails. There are however a few constraints that need to be kept in mind. These are things like the quality and type of the connection and the available bandwidth. A normal telephone line and a dial up modem can be used with all our services and applications. Satellite connections are not recommended because it normally has a high delay (latency) caused by the long distance the signal travels.
Below follows a table that can be used as reference:
Gamlot Products |
CONNECTION TYPE |
SOFT PHONE |
GATEWAY PHONE |
VOIP GATEWAY |
TELEPHONY ADAPTOR |
APPLICATIONS & SERVICES |
TV BUZZ |
| Analogue Dial-Up |
Yes |
Yes |
No |
Yes |
Yes |
No |
| BRI ISDN Dial-Up |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Broadband Wireless |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Code / DSL |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Leased Line |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Gamlot products work best on broadband or dedicated connections.
How Much Bandwidth Do Your Products Need To Work?
The amount of bandwidth needed for any VoIP device to work varies from one device to another and is influenced by the design and configuration of the device. Speech quality and bandwidth used are normally a trade off. The higher the speech quality the more bandwidth is utilised. Calls made through the normal telephone network normally use 64 Kbps. Gamlot products will in general not use more than 20 Kbps per call.
Can I Use My USB Cable / DSL Modem With Your VoIP Devices?
Gamlot VoIP devices can work on a variety of Internet connections, including Cable and DSL modems. USB Cable and DSL modems are designed to connect directly to your PC's USB Port to be used by the PC alone and is mostly used in a home environment. USB Cable and DSL modems are compatible with all the services we provide and the applications that we offer, e.g. Soft Phone, E800 and E900. The products that are focused on the business user like the Gateway Phone and VoIP Gateway are not compatible with USB Cable or DSL modems that do not have an Ethernet connection point when normally used. It is however possible to connect the Gamlot Gateway Phone to a USB Cable or DSL modem with no Ethernet port, provided that the PC used has a Network Interface Card (NIC) installed. The Gateway Phone must be programmed to make use of DHCP to obtain an IP address and for the connection using the USB Cable or DSL modem, Internet connection sharing (ICS) must be enabled.
What Is Bandwidth?
Bandwidth is the term used to describe the measurement of how much information (data) can pass through a communication link in one second. Bandwidth is measured in bits per second (bps). A bit is the smallest and most basic measurement for information and can either be a binary 1 or 0. If you rent a 64Kbps dedicated leased line from your service provider, you can download information from the Internet at a speed of roughly 64 000 bits per second.
Can Your Products Work Behind A Firewall?
Yes, our products can work behind most firewall's. In some cases the firewall will need to be configured. There are primarily two types of firewall's in use, software products that are loaded on individual computers and firewall's that operate on a network level. For firewall's on individual computers, you need to add your Soft Phone application to the list of applications allowed to access the Internet. Please refer to your firewall's operation manual. In cases where a firewall is introduced for an entire network, the following ports need to be open:
P TCP ports 1719, 1720, and 9999 P UDP ports 1719. 1720, 41000 and 41001
This action will have to be completed by a network administrator or advanced user.
Can Your Products Work Through A Proxy Server?
Yes, all Gamlot products can be configured to make use of a proxy server to access the Internet.
Can I Use This Service With A Satellite ISP?
Yes you can, but it is not the ideal situation as the delay on satellite links is normally high. If no other means of connecting to the Internet can be utilised, your product or service will function, but you might experience a delay in conversation.
Will Gamlot Products Work With My Current ADSL Modem?
Gamlot products will in most cases be able to work without any modifications to your current ADSL connection. If you have more than one computer connected to your ADSL modem, all Gamlot products and services should work on your network. If you have a single computer connected to your ADSL Modem you might need to introduce a network switch and a small router to your network.
What Is Broadband?
The term broadband is derived from broad (wide or big) bandwidth; it normally refers to a connection that has a capacity of higher than 64 Kbps. ADSL is an example of a broadband Internet connection.
Most Calls I Make Are Better Than A Normal Phone But Why Do Some Calls Have Poor Voice Quality?
In spite of the superior digital technology built into our products, it is still possible for call quality to be influenced by external factors. These external factors depend on the type of call you make.
Calls To Other Buzz Subscribers?
When making calls to other Buzz subscribers, the one thing that has the greatest effect on call quality is the available bandwidth. Available bandwidth is influenced by the condition of your local network and Internet connection as well as that of the Buzz subscriber you are calling.
Calls To Conventional Phones?
VoIP Calls to conventional phones are also influenced by the condition of your local network and Internet connection as well as the condition of the network the other party is connected to. The local telephone network might be old or overloaded.
Calls To Mobile Phones?
When making a VoIP call to a mobile number, the call quality is influenced by the condition of your local network and Internet connection as well as the condition of the mobile network you are calling to. The mobile number you are calling might be in a spot where there is bad coverage or the mobile network might be overloaded. Although there are factors that can result in bad call quality, you will in most cases have a good calling experience.
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