Modems; Direct Connections - Black Box 16 port User Manual

Modems

Direct connections

Modems; example connections,
B l a c k B o x d e v i c e
R S 2 3 2 R J 4 5
Notes:
1. At the modem, signal RXD is received data from the PSTN; signal TXD is
transmitted data to the PSTN.
2. In addition to the signals shown in the examples above, you may connect
Protective Ground (P/GND) if you have shielded twisted-pair (STP) cable.
Connect P/GND at either your equipment or the Black Box device (but not both).
P/GND will reduce interference in noisy environments.
Black Box Console Server user guide
R XD 6 <— —— —— — ——
T XD 5 —— —— —- - —>
R TS 8 <— —— —— — ——
C TS 7 —— —— —- - —>
D S R 2 — — — — —- - —>
S /G ND 4 —— —— —— — -
D CD 1 <— —— —— — ——
D TR 3 <— —— —— — ——
M od e m
D B2 5
3 R XD
2 T XD
5 C TS
4 R TS
20 D TR
7 S /G N D
8 D CD
6 D SR
140