Samsung OfficeServ 7400

Samsung Telephone System

This system supports up to 480 extensions and is mostly
modular. Modules include line modules for ISDN, voicemail module, digital
extension modules, analogue extension modules. There is also an expansion
module to give you those greater number of connections. On the IP side you
don’t really need the expansion chassis. The IP expansion modules are for each
individual licence, so you need less IP modules within a chassis to service the
same number of IP extensions.


  • The model’s chassis are different, but the
    handsets are the same. The handsets are interchangeable across the range
    (excluding the 7030).
  • The modules for the 7100, 7200 and 7400 are
  • Supports analogue, digital and IP.


  • As they are modular, it can be quite pricy to
  • Space less of an issue but you end up with a big
    system as you have these modules.
  • You don’t gain the full capacity of the chassis
    – you can put 9 modules in but realistically, you only have 7 available as 2
    are used by the processor module and expansion module.

Get in touch

If you’re already running a Samsung phone system and are looking for support, please see our maintenance page.

If you’re looking to purchase a Samsung phone system, please call us on 0844 993 4200 to discuss your requirements.

System Manual Downloads:

    Frequently Asked Questions


    An analogue phone is just for voice services. To do other things, you have to dial a number or press a recall key to get transferred. It uses a basic phone handset that requires the system to provide power.


    A digital phone can provide call information, extension status, information from other extensions and calls. This is displayed on the handset e.g. Caller ID etc. This also requires the system to provide power.


    An IP phone uses a data network to communicate with the phone system. It is more like an IT device, a laptop, or a smart TV. It requires structured cabling so doesn’t work over traditional 2 wire telephone cabling. An IP phone also requires a network switch to provide power to the phone itself.

    A soft phone is an application or a piece of software that is installed on your computer/phone/tablet that allows you to connect to a phone system over the mobile or data network. This is in place of a physical phone. You open the software/application and it displays a phone interface that you use as if it was a physical phone. 

    Software like Skype and WhatsApp are soft phone applications. It creates an audio or video connection. On software phones connected to phone systems, they also give the option to transfer to another extension, transfer to voicemail and other features. They work the same as a physical phone but with reduced functionality - as they don’t give you the same features but you can see who’s on the phone and listen to voicemail for example.

    Unified communications bring all the different ways that people communicate into one platform. They may have a physical phone on their desk, a mobile phone, emails and possibly social media.

    An example of this in action would be a call that comes in first to your desk phone, then to your desk phone and mobile, then it diverts to your voicemail which is then delivered to you as an email. That is then tracked by your CRM system. The unified communications system integrates with the other software.

    Computer Telephony Integration is a system or technology that allows a phone system and a computer to connect or integrate.

    These integrations allow advanced features to be used, for example caller information popping up on your screen (often known as call popping), advanced call transfer functionality, call routing, and call centre systems.

    Some larger or more advanced phone systems require a chassis which is like a rack or filing cabinet which contains 3 rows of slots.

    Each of those slots is the right size for a module to give you connectivity on the front to either connect your extensions or connect your lines or an application like voicemail.