Insys Modem 56k 4.1 m/UL 11-02-01-01-40.022 Manuale Utente

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INSYS Modem 56k UL 
 
Command Overview
 
Juni 05 
25
 
5.2.7  Phone Interface 
 
E   W
b2  b1
a2  a1
8
7
6
5
4
3
2
1
1 2 3 4 5 6 7 8
RJ45
Stecker front
TAE-Stecker
von unten
 
RJ 12 and RJ 45 
 
a1 and b1 are the incoming phone lines (e.g. outside line or private branch exchange). 
a2 and b2 are used to connect a phone in series. In idle state, they are connected to a1 
and b1 via a loop current connector. a2 and b2 are detached as soon as the modem uses 
the line. 
note: 
a2 and b2 are for the connection of a following telephone equipment. This tele-
phone equipment should be certified accordant UL 60950-1 part 6. Using only 
cable Typ AWG26. 
Pin RJ12 
plug 
Name 
Pin RJ45 
socket 
Name Pin Name 
1 NC 
a1 
NC 
2 NC 
b1 
NC 
3 a2 
b2 
 
 
RJ 12 plug with 
nose downward 
RJ 12 plug front