BELGACOM Forum 523, Руководство по монтажу и пусконаладке, Страница: 54 / 244

Port Assignment, Termination, Cable Length 52
Installation
Pressure terminals are used for internal and external S
0
ports. The
connection assignment of the pressure terminals changes when
switched from internal to external, as shown in the diagram
above.
Tip: If, for example, you have connected an IAE socket to an
internal S
0
port, and wish to switch the S
0
port to external operat-
ing mode, you will need a crossover ISDN connection cable to
connect the IAE socket to an NTBA. The assignment of a crossover
connection cable is described in the chapter on
PBX Networking
under the heading Direct Connection starting on page 156.
S
0
int
2a 2b 1a 1b
1 2 3 4 5 6 7 8
S
0
ext
1a 1b 2a 2b
1 2 3 4 5 6 7 8