21
MULTIPORT CSU/DSU
Switches S3-5 and S3-6: Reserved for Future Use
Switches S3-5 and S3-6 are
reserved for future use
and must remain in the OFF
position.
Switches S3-7 and S3-8: Control Port Data Rate
Use Switches S3-7 and S3-8 to configure the CSU/DSU’s control port bit rate.
Table 3-18. Settings for Switch S3-7 and S3-8.
S3-7
S3-8
Setting
On
Off
9.6 kbps
Off
Off
19.2 kbps
3.2 Configuring the Software Switches
You can configure the Multiport CSU/DSU via a menu-driven command system.
Follow the instructions below.
1. Connect the serial RS-232 port of a VT100 or similar DTE with terminal
emulation to the EIA/TIA-5611 port of the CSU/DSU. To construct an
RS-232 to EIA-561 patch cable, refer to the control-port pinout diagram in
Appendix A
. For a pre-made cable, refer to
Appendix B
and call Black Box
Technical Support at 724-746-5500 for details.
2. Power on the terminal and set its RS-232 port as follows:
•
19,200 bps (or as defined by DIP Switch S3-8)
•
8 data bits, 1 stop bit, no parity
•
Local echo
•
CR-CR/LF on inbound data
•
ANSI, VT-100 emulation
3. Power on the CSU/DSU.
