Product manual

Product Manual - DM991 Series V Family - 204.4092.08 26
Function Signal DB25 Signal Source
Received data OUT core 21 DM991
Received data OUT shield 14 DM991
Transmitted data IN core 18 E1 Network
Transmitted data IN shield 25 E1 Network
Table 14. DM991S/SE - G.703 Proprietary Pinout (DB25)
5.2. DM991C/CE
There are straps that allow you to connect the external coaxial cable network to the ground. On models
DM991C/CE with PCI rev. 04 or higher, this applies both to the input channel (RX-IN) and to the output
channel (TX-OUT). On models DM991C/CE with PCI rev. 03 or lower, this applies only to the input
channel (RX-IN); in this case, the external output coaxial cable network (TX-OUT) is always connected to
the ground.
The G.703 signal output is available on the BNC OUT connector or between the pins 4 and 5 of the RJ48.
The G.703 signal input is available on the BNC IN connector or between the pins 1 and 2 of the RJ48
Function Signal RJ45 Signal Source
Received data OUT 4 DM991
Received data OUT 5 DM991
Transmitted data IN 1 E1 Network
Transmitted data IN 2 E1 Network
Table 15. DM991C/CE - G.703 RJ48 Pinout
Be careful as not to let those straps be in the grounded position when a 120-
ohm twisted pair is used on
the RJ48.