FMN alpha DSL WTM L, Instructions For Use Manual, Page: 8 / 16

8 9
Connection
3. USB / LED connecting socket 6-pole on modem PCB for external DSL signalling
PIN Assigned with
1 Cathode
2 + 3.3 V (Anode + R
V
)
3 0 V (USB)
4 D+ (USB)
5 D- (USB)
6 VBUS (USB)
4. Connecting socket for internal power supply 3-pole on modem and power
supply PCB (at versions alpha DSL WTM PC AD and alpha DSL WTM PC BD or
alpha DSL WTM LP AD and alpha DSL WTM LP BD for the connection of modem and
power supply PCB; at versions alpha DSL WTM LP A and alpha DSL WTM LP B for the
connection to the external power supply)
PIN Assigned with Comment
1 0 Volt Ground
2 + 3.3 Volt Supply voltage
3 + 12 Volt Signalisation input power
Maximal current of supply voltage 3,3 V at PIN 2 is 2 A.
PIN 3 is the signalisation input power. If the voltage at PIN 3 is drop down under 10 V, then
the modem send „Dying Gasp“ to the DSLAM. The supply voltage 3,3 V at PIN 2 has to be
hold higher than 3,3 V over a period of 60 ms if the voltage at PIN 3 sinks under 10 V.
5. Connecting socket for external power supply 2-pole on power supply PCB
PIN Assigned with
1 0 Volt
2 + 12 Volt
At the versions alpha DSL WTM PC AD and alpha DSL WTM PC BD or
alpha DSL WTM PC A and alpha DSL WTM PC B , the voltage supply is realized
according to PC/104 specification over the PC/104 connectors.
JST S3B-XH-SM3-TB (LF)
PIN 1 PIN 3
JST SM06B-SRSS-TB (LF)
PIN 1 PIN 6
JST S2B-PH-SM4-TB (LF)
PIN 1 PIN 2