CHAPTER 3: Installation
9
NOTE
The IBM device parameters should be set for non-switched/leasedline.
If different settings are required, see steps 7 through 10.
7. Select the CTS control by installing both the “A” and “B” CTS constant/switched straps.
In the switched position, a CTS signal is generated when the SME-4M receives an RTS signal
(in the digital loopback test mode, the control signals always will be ON). In the constant
position, CTS and Carrier Detect (of the respective port), and Signal Quality of the other
port are always ON.
8. For switched CTS applications, select the CTS delay for Port A and B by installing the CTS
delay selection straps. Delays of 0, 10, and 50 milliseconds are available.
9. Select the DSR control by installing the “A” and “B” DSR remote/local straps. In the remote
position, the DSR signal is generated when the other port receives a DTR signal. In the local
position, DSR is always on.
10. The CD (Carrier Detect) option is controlled by setting the “A” and”B” Switched or Constant
straps. In the Switched position, a CD signal is generated when the other port receives a RTS
signal. In the Constant position, CD is always on.
NOTE
If the CTS options are set to Constant, the CD options have no effect.
11. Install the top cover.
12. Connect the communication devices to ports A and B.
13. Plug in the transformer.
14. If the local DSR control was selected by the configuration straps, the CON front panel switch
must be in the OUT position to turn DSR ON. Set the CON switch to the IN position to turn
DSR OFF.
15. If required by your application, press then release the momentary RING switch to send Ring
Indicator signal.
16. Observe the indicators for each item of DTE to monitor the status.
17. The SME-4M is now ready for operation.
