APPROVAL No. NS/1208/23/D/021737/C
Line Interface Module (LIM), group switch, TJF, Teleprinter (Texas Instruments 765 or 703), Deck mounted tape deck(s) (Tanberg TDC3000/IR), Harmer and Simmons power plant type varies in accordance with size of system.
Made, distributed and installed by:
Ericsson Telecommunications Ltd (ETL)
Viking House, Foundry Lane, Horsham, West Sussex
Telephone 01403 64166.
Approved for private supply and installation in July 83.
This range of telephones is known by Ericsson as the 'DBC' family of digital telephones. There are four telephones in the same basic design, with modular construction and the same general functional specification. The main differences between them is the features and programmable keys found on each model. The Dialog 2501 is the standard digital set, the 2531 is the intermediate model and the 2561 is the top of the range. The 2563 is almost the same as the 2561 but has more programmable keys.
The 2501 has two line access keys and five programmable function keys, one of which has an associated LED. It is also equipped with a Transfer key, a handset volume control and a volume control for the ringer.
For voice/data applications, the 2501 can be used with the TAU-PC.
The 2531 has all that the 2501 has, plus an inquiry key (which acts as a third access to the 'own' line), 12 programmable keys with LEDS, a built in speaker (monitor only) and a ring pitch control. It also has Mute, Programming and Speaker keys.
For voice/data applications, the 2531 can also be used with the TAU-PC.
The 2561 is the top of the range in this family. It has everything that the 2531 has, plus completely hands-free operation and a built-in liquid crystal display which provides calling/called number display and a variety of other useful information.
The 2561, like the others, can be used in conjunction with the TAU-PC to provide simultaneous voice/data communications.
The 2563 is similar to the 2561 but has 43 keys.
1. R4 S/W AND LATER
These telephones are fully supported on R4 and later releases of software. They may be configured by using the guidelines that are detailed in section 7, Key Layout and Commands in conjunction with the Ericsson site documentation.
2. PRE R4 S/W
If these telephones are to be configured on pre R4 software then certain adjustments need to be made to the software for successful operation. These adjustments can only be undertaken by BTFSU (BC/CSP/BCC535) or Ericsson Ltd. There may also be slight differences in the ITYPE commands, BTFSU will be able to advise.
Ericsson's MD110 business communication systems deliver a new architecture to support new ways of working for an increasingly mobile work force. The MD110 is the world's most advanced PBX system, offering powerful solutions for today's and tomorrow's networks. This unique system combines Ericsson's world-leading expertise in switching, networks and mobile communications to deliver the benefits that users demand.
Based on a modular and distributed architecture, the MD110 provides the foundation for a unified network that supports integrated voice, data and multimedia applications. Because of its distributed architecture, the MD110 provides a high degree of fault tolerance and excellent scalability, from a few hundred to 35,000 or more users in an office, campus or enterprise environment. Full mobility is supported in any configuration and across multiple locations.
Ericsson's MD110 stands out as an exceptional system that prepares you for the future while providing a cost-efficient solution for today's business communication needs. Whatever your requirements, today or tomorrow, there is an MD110 system that will exceed your expectations. Today, there are more than 12 million business users who reply on the MD110 and who have placed their confidence in Ericsson to protect their investment in the future through continuous system enhancements.
A PBX is no longer a standalone system for voice communications. Today's business need a unified network for both voice and data is an integrated part of a larger communications infrastructure. The MD110 is unique in providing a truly open platform that supports all major existing and emerging standards and powerful network management functions to provide the ultimate in flexibility in supporting the flow of all types of information into and out of our organization.
System structure and configuration
Distributed control system
Each stack is controlled by its own processor and switch, providing outstanding redundancy.
MD110 feature Link:
The MD110s modular design and distributed processing power (massive multi-processing) make it unique among business communications systems.
MD110 PBX distributed architecture provides flexible processor power, allowing you to dimension traffic handling capacity and system size to exactly match your requirements. In centralized processor systems you either have too little or too much.
Stacks may be built with one to four stackable modules. Stacks may be placed side-by-side or back-to-back.
Flexibility (even processor load)
The use of universal hardware and software in the MD110 makes reconfiguration and expansion of the system easier and less expensive.
Reliability and availability
In addition, each PSM is capable of autonomous operation if the feature link to the rest of the system fails.
The MD110 software is divided into central and regional operating segments. Each PSM contains all the necessary regional software to ensure complete control of intra-PSM call processing.
Communication between PSMs in controlled by central software, which is accessed as required by the originating PSM. The central software is duplicated in several PSMs for added reliability.
Decentralized system on the premises or campus.
The modular structure of the MD110 system in combination with the unique advantages of distributed processing enable Ericsson to supply systems precisely tailored to customer requirements and the physical layout of their organizations.
The MD110 PBX has no predefined system configuration. Instead, users can build up an integrated voice and data network using standardized elements (modules). Processing power (PSMs) and capacity (PSM/IFM) can be loaded where they are needed, to suit users unique communication requirements.
Interconnection of modules (PSM/IFM) is achieved using the unique MD110 PBX feature link, providing 100% feature transparency, independent of distance between the modules and number of user.
Users are thus mobile anywhere in the coverage area, which may include multiple sites. Integrated roaming and seamless handover are supported as optional software in the MD110. No additional server is needed. With the personal number service, mobility is further enhanced, letting users respond to business calls wherever they are.
Now, the system has been enhanced with Dynamic Route Allocation (DRA) to support feature transparency over public switched ISDN or IDN networks for PBX interconnects, thus eliminating the need for expensive dedicated leased lines. DRA uses voice compression to support up to four calls on one channel, resulting in substantial savings on traffic costs.
In addition to enhancing cost-efficiency for existing network solutions, the new DRA functions allow full network integration of corporate sites without dedicated trunks and provide an easy upgrade path to tomorrows ATM networks.
This function not only route incoming calls to the correct person and department but also organizes extensions into call groups, which may be in the same office or in different locations. Depending on your requirements, various options are available for call group supervisors and agents, including Call Centre Manager and Agent Desktop applications.
New SNMP tools are being added to the Dynamic Network Administration family of network management tools, which includes Directory Manager, Extension Manager, Performance Manager, Node Manager and Event Manager, as well as the Management Repository Server, which is common to all applications, and Operator workstation and Personal screen Call applications for users.
The personal Number service will keep track of where to locate the user. Each user may have up to five personal profiles, which may be activated according to the situation (in the office, traveling, at home, etc.). the profile determines what happens to incoming calls, which will be forwarded to different telephones in a pre-defined order or transferred to a back-up service.
Integrated Voice Mail
Each card supports up to 300 mailboxes and 16 simultaneous sessions.
Up to 10 hours of voice mail messages can be stored on a separate hard disk. Basic functionality includes storing, scrolling retrieving and deleting of messages. Users may record personal greetings.
Incoming calls to the correct person and department also organizes extensions into call groups, which may be in the same office or in different locations. Depending on your requirements, various options are available for call group supervisors and agents, including call centre manager and agent desktop applications.
Last revised: November 09, 2020