Test Mode Switch; Optical Ports - GarettCom 5843HRT User Manual

Models 5843, 5844, 5843S and 5844S
RS232 or TTL
1.2.6 Pin 8 Current Output Option Switch 5B:
Models 5843 and 5844 Links are provided with this switch to allow users select one of 2 output source
drive current values for the TTL output pin (pin 8). Selections are 10ma (207 Ohm) or 20ma (67 Ohm).
Consideration should be given that the current value selected is appropriate for the input of the device
being connected to this data channel.
1.2.7 Test Mode Option Switch 3B:
Models 5843 and 5844 Links are provided with this switch to allow users who wish to test the fiber
connections of the link with a built in diagnostic mode. This mode sends a 100Hz signal out the
transmit port as well as looping back the copper port (pins 2 and 3) for diagnostic purposes.
1.2.8

Optical Ports

There are two optical ports, T and R. The T optical port transmits data signals optically to the next
Link/Repeater. The R port receives the optical data signal from another Link/Repeater's T optical
port. Each port is fitted with an "ST" type receptacle for attaching the FOC.
High/Low
Hanshaking DSR/OFF
Test M ode O N/O FF
Data Coupling DC/AC
Repeat M ode O N/O FF
DCE/DTE
FIGURE 4. Switch Settings
T
R
Fiber Connector
Fiber Connector
Figure 3 Optical Ports and Electrical Port
9 Pin D Sub
Connector
Pin 1
1-7