General information for IPT telephony


In 2005 the university started to use IP-telephony, also known as VoIP (Voice-over-IP). This technology was introduced at the time a new building was put up on campus (T-building). Other locations on the campus continued to use the analog telephony build around a classic telephone exchange (PABX). At the end of 2007 the decision was made to replace the old analog system by modern IP-telephony. The goal was set to finish the migration in 2009 and discontinue the PABX in the beginning of 2010. Furthermore, new phonelines are now being installed using IP-telephony technology.

In IPT speech and fax traffic are handled digitally over the locally available university data network (EURnet). As long as the old analog exchange is still operational a cross connect is in place to interconnect the old and new systems. This facilitates that users can continue to use the well known 5-digit internal phonenumbers throughout the university. For calling external destinations (off campus) users have to dial a leading zero, as usual.

Characteristics and particulars

A summary of the most important issues that will be encountered by IP-Telephony solution users (so far only in the T- and J-building) is presented below.

Special telephone sets

Special telephone sets are being used, the so-called IP telephones, also known as IP phones. These look different from the classic analogue sets: they are a bit bigger and the standard sets have an LCD display to show status and operating information. For example, the number of the set is always displayed at the top of the screen on the right hand side.

Moving an IPTelephone

An IP phone can in principle be connected to any data outlet made suitable for IPT. Almost all data outlets in the campus offices are suitable for IPT, which means that a telephone set can be moved within the University environment and continue to be functional without intervention of the telephony-manager. However, the disadvantage of this is that telephone sets may be left lying about, which could make it difficult to manage them.

Voicemail functionality

IP-Telefony users can, if required, get access to voice-mail functionality. A short manual is available:

manual voicemail

Different types of telephone sets

Three different Cisco Systems IP phones are used within EUR. These are listed in the table below. You can download a user manual for each type of set, with a language choice of Dutch or English.

Cisco7940G/7941G-GE- the standard set

recommended manuals:
full userguide
userguide at a glance


Cisco7960G/7961G-GE - a full set

recommended manuals:
full userguide, english version
userguide at a glance, english version


Connecting a set to the data network

An IP-phone must be connected to the university data network. This means that the device is connected to a network outlet (so-called wall outlet) by means of a standard UTP cable (of the Systimax Solutions make). Consult the manual for establishing the correct cable connection. Your local ICT ServiceDesk can provide further information.


The voltage necessary for the IP phone to function is provided via the network connection (in technical terms this is called in-line power or power-over-ethernet).
The power source to the telephone is interrupted as soon as the set is unplugged from the network. After plugging the set back in, it will take some time before it is ready for use again. During this time the set will go through a start-up process. The time this takes depends on the specific type of set (the more deluxe/bigger the set, the longer it takes to start up). The display will show you that the telephone is ready for use; at that moment, the telephone number of the set will appear in the top right-hand corner.

Telephone set does not start up

If a telephone set unexpectedly does not complete its start-up procedure, a technical failure must be involved, very probably at the cabling and/or data outlet level. In these situations the user should contact the faculty I&A helpdesk.

Telephone system support

In case of a failure in telephone traffic or for questions about the use of the telephone, please contact the ICT Servicedesk:


Telephone: 81663

Connecting a PC to an IPphone

It is possible to connect a PC to an IPTelephone. Consult the manual of the device to establish the correct cable connections. Either the (black) UTP cable delivered along with the telephone can be used for connecting the telephone set to the PC, or else any cable of the Systimax Solutions make. The PC connected is then (indirectly) connected to the university data network. Although this is switching telephone and PC in series, this is functionally equivalent to the situation in which the PC is directly connected to the EUR net via the network connection point. However, it should be observed in this case that when someone disconnects the IPTelephone from the network, the PC will also lose its connection.

Data speed

A computer connected to the network through an IP-phone will operate at a bitrate supported by the pc-port on the IP-Phone. Depending on the type of phone this will be either max 100 Mbit/s or max 1000 Mbit/s. Only the newer models (type 7941G-GE or 7961G-GE) supports 1000 Mbit/sec.