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The PBX enables you to connect some devices directly, inasmuch as they are close enough
to the PBX. The distance depends on the length of the equipment connection cables up to a
maximum of 10 m.
If no suitable connection sockets are available or are too far away, you must lay the
installation cable permanently. Use installation cable (e. g. J-Y(St)Y 2x2x0.6) with the
following characteristics:
Unscreened; however: screened for unfavourable conditions, for example, near a strong
transmitter or an electrical power line
Analogue: Prevent interferences. Avoid laying long lengths of parallel lines, especially next
to the mains. Twist the pairs.
Accessories and service parts can be bought at specialised stores.

Ethernet Port

Requirements:
For Internet access: Broadband Internet connection (e. g. DSL router, TV cable router)
Existing network (LAN) or single switch (for VoIP terminals) with a data transmission rate
of 100 Mbit/s
Note: For VoIP data communication in combination with the transmission of additional
data (e. g. downloads), we recommend a data transmission rate of 100 Mbps. For a
reliable support of 100 Mbps, you need cables and wall sockets of at least Category 5
(CAT 5).
Note: When using a switch with PoE function, a separate power supply (e. g. via a
power plug) is not required for connected VoIP telephones, always provided they
support PoE.
• For the use of DiffServ for prioritising language packages: DiffServ support of all
active network components is available and enabled.
• NAT traversal should be carried out either by the PBX or by a well-functioning SIP-
aware router.
Note: If the router is not SIP aware, several of the ports on the router necessary for
VoIP data communication must be enabled (RTP port and SIP UDP ports) (port
forwarding). A list of the ports used in the PBX can be found in the web interface of the
PBX under Administration > Network > Ports.
Caution: Opening a port on the NAT router is a security risk.
• Take additional protection measures.
Important: If you want to integrate the PBX into an existing network, contact the
responsible system administrator. Making changes to an existing network can cause
considerable malfunctions.
COMtrexx Business - FW 1.4 - Instructions V02 06/2021
Installation
37

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