7
Connecting analog users ¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢
You may connect all analog terminals to the
telephone system that you are also allowed
to operate on the public telecommunica-
tions network.
a/b terminals
are:
- Telephone (a/b telephone) with tone dial-
ling (DTMF).
r
key as the flash key (flash
time: 50-180 ms),
S
key and
R
key.
Only restricted use can be made of tel-
ephones that are set to pulse dialling.
- Group 3 fax machines
- Answering machines
- Modem (up to 28 800 bps)
Connect a/b terminals by means of two
wires to the La and Lb wires (speech wires)
of the Vario ports. You must not connect
the Da and Db connections.
System telephones
Connect system telephones by four wires to
the Vario ports by connecting them to the
La and Lb wires (speech wires) and the Da
and Db wires (data wires; data for signalling
and displays)
Connecting subscriber lines
- Mark the lines with the marking system
included
- Strip 11 mm off the wires
- Push the individual wires into the terminal
until they move no further,
without
pressing the terminal spring.
- To separate a connection, use a suitable
tool (screwdriver with a narrow blade) to
press down the terminal spring and pull
out the wire.
Fixed external S0 access S0 0/1 (Western socket) ¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢¢
Point-to-point connection
You may only connect one ISDN telephone
system to an ISDN point-to-point connec-
tion. You cannot connect any further ISDN
terminals.
Using the ISDN connecting cable, connect
the ISDN telephone system directly to the
NTBA or to an ISDN socket (IAE / UAE) that
is connected to the NTBA.
Terminators for the external S0 access
S0 0/1
For a point-to-point connection, the two
switches S1301/ab (on the component side
of the module) for the 100 Ohm terminators
must be closed.
Point-to-multipoint connection
The point-to-multipoint connection may
consist of an S0 bus. Up to 12 ISDN sockets
(IAE / UAE) may belong to this S0 bus. Be-
sides the ISDN telephone system, you can
connect up to 7 further ISDN terminals to
the S0 bus.
Terminators for the external S0 access
S0 0/1
For the point-to-multipoint connection, the
two switches S1301/ab for the 100 Ohm
terminators must be:
-
closed
if the external S0 access is
connected directly to the NTBA or to the
last IAE / UAE socket and the 100 Ohm
terminators in the socket are not con-
nected,
-
open
if the 100 Ohm terminators in the
last IAE / UAE socket are connected or the
telephone system is not the last ISDN
terminal on the point-to-multipoint con-
nection.
Use the ISDN connecting cable to connect
the ISDN telephone system to an ISDN
socket of the S0 bus.
If the point-to-multipoint connection does
not consist of an S0 bus, you can connect
the ISDN telephone system directly to the
NTBA.
