Interfaces and Connectible Terminals U pn
Ports
Note on the MS+UPN2-8 Interface Card
U pn
interfaces can only be used to connect DECT base stations if the MS+UPN2-8 has been installed in the master system; if this card is in the slave system, it is not possible to connect any DECT base stations to the card’s U pn
interfaces.
Note on the MS+UPN1-8 Interface Card
The U pn
interfaces of the
MS+UPN1-8 interface card cannot be used to connect DECT base stations.
5.3.2 Technical Information
The U pn
ports have been implemented as RJ45 sockets.
Each of the devices listed above can be connected to the U pn
interface by means of a two-wire 1:1 cable. System terminals come with a suitable cable for connection to the RJ45 socket of the interface.
A two-wire cable connected to a U pn a 0.6 mm twisted-pair cable.
port can be up to 1000 m long, provided it is
Each U pn
port has a power feed of approx. 2.1 W. The short-circuit-proof feed voltage is – 42 V.
5.3.3 DECT Base Station Connection Variants
A DECT base station can be connected to either one or two U pn
interfaces:
■ If the DECT base station is connected to one U pn
interface, four simultaneous calls or connections can be made through the handsets.
■ If the DECT base station is connected to two U pn
interfaces, eight simultaneous calls or connections can be made through the handsets.
Please note that it is not possible to establish more simultaneous external connections than there are external B channels.
To connect a DECT base station to two U pn ports on the MS+UPN2-8 interface card: U
interfaces, you can combine two U pn
ports 1+2, 3+4, 5+6 or 7+8 (U pn pn
port 2 is connected to U pn
port 1, U pn
port 4 to U pn
port 3 etc.). Ports are combined by setting the DIP switches on the card accordingly. In this configuration, the DECT
46
Interfaces and Connectible Terminals U pn
Ports base station must be connected to the first U pn cable (system telephone cable).
port of the pair by means of a 1:1
Pin Assignment
1 2 3 4 5 6 7 8
U pn interface pin assignment
The following table explains the U pn
interface pin assignment.
6
7
4
5
8
2
3
Pin Number
1
Assignment
Not used
Not used
U pn
a *)
U pn
a
U pn
b
U pn
b *)
Not used
Not used
*) If the DIP switches are set accordingly, the conductors of the adjacent U pn
port will be connected here; use only the first U pn
port in this configuration.
Setting DIP Switches
1.
Remove the interface card by following the instructions in Installing Interface
Cards starting on page 31.
2.
The DIP switches are protected by a plastic foil. Use a pointed tool such as a screwdriver to slide the DIP switches to the right (see arrow in the illustration
Location of the DIP switches on the MS+UPN2-8 interface card on page 48).
47
