Hard & Software

    What telephone do I need for VoIP?

    To use VoIP, you’ll need VoIP-enabled telephones. These are available in a wide range of types and sizes, from simple desk versions to fully equipped reception and office-manager units. Cordless DECT units can also be used. Most sets accommodate, for example, (cordless) headsets, or modules for additional speed-dial keys for receptionist use.

    VoIP telephones are connected using a standard network cable. At most companies, this is also connection normally used for the computer network.

    What hardware and software does gnTel actively support?

    gnTel supports hardware and software it has found works properly in combination with gnTel telephony services. gnTel does not have a continuously updated manual for basic configurations. gnTel can provide support with adjusting the hardware and software needed for its telephony services to work.

    • Yealink T-Series
    • Cisco SPA 525 G2
    • Innovaphone
    • SNOM
    • Counterpath Bria softphone
    • Counterpath X lite softphone
    • Gigaset N 510 IP pro
    • Tiptel 284 and 286 IP
    • XRS 5440
    • Robin Smartview

Flat Fees

    Can I pay a flat rate for a small number of personnel?

    That is not possible. We are able to offer the flat rate at such an attractive price because we assume that some people call a great deal and others much less. Our starting point is average use and, as a result, the average customer does indeed profit from our competitive rates.

    How does the fair-use policy work in combination with the flat fee?

    Until 25% of the norm is exceeded, nothing happens. Above that, normal competitive variable prices apply. More information can be found on our prices page.

All-you-need Pay-per-Line

    How can I calculate how many lines I need?

    FlexPBX is limited as to the number of simultaneous external calls it supports. The number of internal calls is not limited within FlexPBX. Just as with a physical switchboard. Under normal office use, you can expect to need five sets per external telephone line. Meaning that in that situation, FlexPBX 8 can be used for 5 x 8 = 40 workstations.

    How many sets can I have?

    The number of sets with All-You-Need Pay-Per-Line is unlimited. The only limitation is the number of simultaneous external calls. The number of internal calls is unlimited.

    What if it regularly happens that no outgoing calls can be made or that callers get a ‘busy’ signal?

    It is possible that the number of simultaneous external calls that can be placed is insufficient. In that case, it would be advisable to increase the number of lines you have.


    How much bandwidth do I need?

    Per call, you’ll need 100 kb/s for both uploading and downloading. Meaning that, with an internet connection speed of 2 Mbit/s, you can realise twenty calls simultaneously.

    What if I move?

    If you move, All-You-Need cloud telephony will automatically move with you. All you need to do is connect your sets to your internet connection at your new location.

    Can I manage my All-You-Need telephony system online?

    Yes. You’ll have online access to your All-You-Need online switchboard.

    Can I also fax online with All-You-Need?

    Yes, that’s possible. You can both receive and send faxes. The costs come to € 6 per month, including an extra telephone number. Please note, however, that, if you don’t really need fax, we would advise against having it. The fact is that all operators are finding it increasing difficult to send faxes problem-free, due to their increasing use of digital networks. If you still use fax frequently, our advice is to keep an analogue line – for as long as it’s possible.

    Can I keep my old telephone numbers?

    Yes, you can take your present telephone numbers with you. If you opt for All-You-Need cloud telephony, we’ll ensure you keep your old numbers, at no additional charge.

    Can you also use AYN for more than one office and for employees working from home?

    Yes, it can be used for several offices and/or employees working from home. Because your switchboard is online, your phones can be registered via the internet, from different locations.

    Which sets can be used with All-You-Need?

    Any set that can be used with VoIP and which the SIP protocol supports.

    Is there an additional charge if I want to use extra functions later?

    No, the idea is precisely that you can use all of our platform’s features with complete freedom. So if you need something extra, it’s ready for you to implement, at no additional cost.


    Is VoIP location-dependent?

    No, this is not the case. As VoIP is not dependent on a fixed connection point (as with a traditional telephone line), you can call and receive calls from wherever you have an internet connection. Your telephone number is not linked to a physical telephone line, but to your VoIP account. So that you can call and be called via your fixed-line number anywhere, as long as you have a connection to your VoIP account via the internet.

    You can allow a call to come in on several different VoIP sets, for example, at the office and simultaneously to your business telephone at home. If you have a smartphone with a VoIP app (such as Bria) and Wi-Fi, you can call and be called via your terrestrial telephone number wherever there is a Wi-Fi connection. Handy if you work at a number of offices or if you’re on a business trip.

    Can an existing switchboard / PBX be coupled to a VoIP connection?

    If your existing PBX can be used with VoIP, you can replace your telephone line with a ‘SIP trunk’. Your telecommunications will then run via your internet connection. The advantage here is that you can continue to use your switchboard and all of the services that run over it, while still benefiting from reduced telephone costs. Plus an additional advantage: The capacity of an SIP trunk can be expanded easily.

    If you are still using a traditional (ISDN) switchboard and would like to replace your telephone line with an SIP trunk, that is possible. In that case, you will need a converter. Our service partner can inform you as to which type is best for you.

    What is SIP-ALG?

    SIP-ALG (SIP application layer gateway) is a special piece of software in NAT (network address translation) routers. This software tries to solve the problems caused by NATs in cooperation with SIP. Unfortunately, SIP-ALG frequently causes more problems than it solves. What͛s more, the gnTel platform itself is excellently equipped to solve NAT problems.

    It is therefore essential for the SIP-ALG in the router to be switched off. Failing this, a range of annoying problems can be expected, such as the account being unable to register, or your not being able to make calls (or sometimes even one-sided audio and the like).

    Information on how to switch off SIP-ALG for a number of routers can be found via the link, http://www.voip-info.org/wiki/view/Routers+SIP+ALG.

    What is STUN?

    To ensure that a VoIP set works properly behind a router/firewall, the use of STUN (simple traversal of UDP through NATs [network address translations]) is essential.

    The STUN protocol enables a set to request detailed information concerning the functioning of its router/firewall from the gnTel STUN servers. This will greatly increase the probability that your VoIP telephony will function problem-free behind a router/firewall.

    What is quality of service (QoS)?

    You frequently share your internet connection with several devices and applications: internet browsers, downloading programs and, naturally, your VoIP telephone sets. If the bandwidth of your internet connection is not sufficient to handle all of this traffic simultaneously, it will be necessary to decide which traffic is to be given priority.

    With the QoS-protocol, you can indicate that VoIP telecommunications must be given priority over other data traffic. While a few seconds͛ delay with a download can be disregarded, you don͛t want to miss a word during a telephone call.

    How good is the sound quality with VoIP?

    The sound quality of VoIP telephony from gnTel is in no way inferior to that of traditional telephony. gnTel VoIP telephony is comparable to ISDN quality. A great deal depends on your internet connection, especially its upload speed. If you use your internet connection for both email communication, browsing and VoIP, it will be necessary to reserve a portion of your upload capacity for speech, in order to prevent your data traffic from adversely affecting it. This can be adjusted via the QoS function of your router or switch.

    To obtain the best possible quality, you can arrange for a separate internet connection for VoIP. This can be either an ADSL or fibre-optics connection with internet access. The ideal situation is to have an ADSL or data connection directly linked to one’s VoIP provider.

    If you do experience reduced sound quality, it is almost always the fault of your internet connection. In such cases, a conversation typically suffers from gaps in transmission, due to insufficient bandwidth over the internet connection being used.

    How does VoIP compare to traditional telephony?

    VoIP telephony (telephoning via the internet) vastly expands your possibilities as compared to traditional telephony. It’s easier to link different offices to one another and it’s possible to phone ‘internally’ between offices, even with ones located abroad. And you can even include those employees who work from home in your business-telephony solution.

    VoIP telephony employs your company’s own computer network and internet connection. So that no separate network has to be added or maintained. You won’t even need to have a switchboard on the premises any more. All you need is one good internet connection. VoIP also increases the possibilities for integration with, e.g., your CRM system. In short: many more possibilities to arrange your business telephony more flexibly and cost-efficiently.

    What is VOIP?

    VoIP is an acronym for ‘voice over internet protocol’ or put simply: telephoning via the internet rather than with a traditional telephone line.

    VoIP can be used to replace an existing switchboard or PBX. Because VoIP uses the internet protocol, it can be combined with your CRM system. VoIP also makes it extremely easy to devise a telephony solution for several offices, both at home and abroad.

    How does hosted VOIP work?

    With hosted VoIP, also referred to as ‘hosted PBX’ or ‘virtual PBX’, you’ll no longer be using an in-house switchboard, but the switchboard of your VoIP supplier. And your telephone sets will be connected to it via an internet connection.

    As a gnTel customer, you can telephone with your personnel and all other gnTel customers free of charge. Calls made to your telephone number are redirected by gnTel to your VoIP set(s). All your calls, external and internal, run via your internet connection and the gnTel platform.

    As a gnTel customer, you can manage your telephony environment yourself, online via a web portal. You can, for example, set your own voicemail or make changes to redirections or your recorded business hours announcement. The possibilities with this (frequently expanded) telephone switchboard are virtually unlimited.

    Can VoIP run over your data network?

    Because VoIP runs via your data network, in many cases, no additional cables are needed. In many office environments, CAT 5, CAT5e or CAT6 data cabling is already present – suitable for your VoIP telephony. And often it is possible to keep using the routers and switches from your existing computerinfrastructure. With large office locations, it is advisable to keep computer traffic separate from telecommunication, this in order better to guarantee the quality of your VoIP.

    Can VoIP be integrated with other services?

    One of the great advantages of VoIP is that it͛s relatively easy to integrate it with computer systems. For example: direct calling from your address book or automatic coupling with a CRM system in order to have customer details at your fingertips – examples of how work processes are easy to support with VoIP. And with tailor-made solutions, virtually any imaginable coupling is possible between VoIP and other computer or database systems.