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Technical information

It in NIIF VoIP network the traditional telephone sub centres (PBX) in all cases VoIP we fit it to the network with the help of gateway. The equivalent quality and operation to developing a contact exclusively ISDN we apply interfaces.

The software sub centres (IP PBX) in case of tying him up the dedicated network device and ISDN interfaces totally can be left IP PBX is able to communicate with the central call leader directly.

We present the more capital technical features of the single accession manners in the under mentioned ones and proposed configurationally manners.

Legacy PBX connection

Physical linking

The institution telephone sub centres (PBX) and HBONE the linking of routers ISDN PRI v. BRI comes true through contacts.

The institution telephone sub centres (PBX) and HBONE the linking of routers ISDN PRI v. BRI comes true through contacts.

The connection the side physical interface of router symmetric G.703 one according to a standard RJ45 claims a contact supplied with a socket. The single telephone sub centres' physical interfaces may differ from this largely in this manner to the joint onto a converter may be need. This may be a converter accomplishing plain cabling joint (Pl. DB-15 - RJ45) you are called symmetry in that manner. This device in that case necessary if the physical accession of PBX is asymmetric (75 ohms coaxial). The contact may demand a sign transformation in the case that the distance of PBX and the router gives reasons for it. G.703 building up the cabling of an interface in a symmetric case 10 metres while 100 may be metres in an asymmetric case.

It follows from this that the symmetric may provide a solution in a plainer case, but in as much this not enough, media you are other transport on a converter through a system may be PBX and the router to connect. They may be systems like this optical E1 transfer systems which turn the sign river into optical signs and it is sent on a couple of optical fibres. It follows from this that the symmetry may provide a solution in a plainer case but in as much this not enough media you are other transport on a converter through a system may be PBX and the router to connect. They may be systems like this optical E1 transfer systems which turn the sign river into optical signs and it is sent on a couple of optical fibres.

This multimode in the case of optical fibre maximally 2000 metres while more are monomode in a case may be ten kilometre. Additional opportunity the different E1 transport the application of systems. At this time it E1 sign river we change it and we fit it to a some other kind of system. This may be SDH or ATM basis system you are rented line accession provided by a service provider possibly.

Configurational settings

Cisco it is possible to do the configuring of routers with a physical level with the setting of the parameters of the controller. In this case this only to be negotiated parameter it E1 in framing the CRC4 his application.

Router side ISDN cabling

2. figure: Router side RJ-45 pin assignments ISDN PRI in case of an interface

3. figure: Router side RJ-45 pin assignments ISDN BRI in case of an interface

ISDN PRI connection

In as much it E1 he managed to develop a contact between PBX and the router there is an opportunity then ISDN onto configuring.

ISDN accession master-slave character in what we distinguish an application and network side. (Cisco routers they can be attached on both manners.)

User side - the device works as application equipment. For an interface like this can be considered those accessions of PBX that towards the public telephone network for your switch. (Main line interface)

Network side - the device works as a service provider interface. This interface in the service provider systems can be found and towards the user provides a contact. (Interfaces like this not frequent in PBX bar in many cases can be configured.)

The proposed linka manner:
Router - NETWORK SIDE
PBX - USER SIDE

The proposed sub centre interface is equal to the interface applied already in PBX in the sense of this that PBX towards the service provider fits it. Applied ISDN protocol Euro ISDN according to ETSI/E-DSS1.

Software sub centre (IP PBX) accession

It is possible to join NIIF VoIP network through IP PBX SIP you are H.323 with the usage of a mark protocol. In our network characteristically Asterisk and Cisco Call Manager implementations can be found.