User guide

Port Assignment, Termination, Cable Length 49

Installation

Connect S

1 externally or S

2 externally to the NTBA (the default

setting is S

1 connected to multi-terminal access and S

2 con-

nected to system access). Use the ISDN connection cable pro-

vided. For the following example, activate the Telephony: Ports:

S0(#): Line termination option in the Configurator. In the

NTBA, 100 ohms terminating resistors between 1a and 1b as well

as between 2a and 2b are required. There are no further devices

connected to the NTBA.

Connecting to the network (NTBA)

You can connect up to 8 terminals (ISDN telephones, ISDN fax

machines, ISDN base stations and ISDN terminals, ISDN cards for

PCs etc.) to each internal S

bus. The power for three of these ter-

minals can be supplied by the bus. Where more devices are used,

they will need their own power supply. The length of the four-wire

cable of an internal S

bus must not exceed 130 m. Each internal

bus has a capacity of about 3 W. The internal S

buses enable

point-to-multi-point calls using the DSS1 protocol (Euro ISDN).

To co n nec t an I SDN t elep hon e , connect a pressure terminal con-

nection to an IAE socket. For the following example, activate the

Telephony: Ports: S0 (#): Line termination option in the

Configurator. In the IAE socket, 100 ohms terminating resistors

between 1a and 1b as well as between 2a and 2b are required.

NTBA

1 external S

2 external