RAD Data comm HCD-E1 User Manual
Page 73
HCD-E1 Installation & Operation Manual
Chapter 3 - Front Panel Operating Instructions
11/01/00 19:52
Configuration Parameters 3-15
Table 3-5 Channel Parameters (Cont.)
Designation
Function
Values
Configuration Guidelines
START TS
Selects the starting time slot
for SEQ or ALT time slot
allocation (not displayed for
USER allocation)
Any number in the range of 0 to 31, consistent
with the desired number of user time slots.
Default: 0
If you have selected SEQ, make sure that the sum of START
time slot number and of SPEED divided by MULT does not
exceed 31.
CTS
Selects the state of the CTS
line in the data channel
interface (not relevant for
the Ethernet interface)
ON
CTS continuously on
=RTS
CTS line follows the RTS line
Default: ON
For polled applications, select =RTS.
ETHER (appears
only when data
channel has
Ethernet interface)
Selects the Ethernet LAN
traffic transfer mode
HALF_DUP Half duplex operation
FULL_DUP Full duplex operation
Default: HALF_DUP
BRIDGING
(appears only
when data channel
has Ethernet
interface)
Reserved for future use.
Always displays FILTER, independently of the
selected Ethernet traffic control function.
To select the Ethernet traffic control function, use Ethernet
bridge DIP switch SW-1, Section 3
(
see
Appendix C). Set the
DIP switch, Section 3 to ON (FILTER) if you want to filter the
traffic sent to the remote end (recommended).
FIFO SIZE
Selects the size of the FIFO
buffer for the data channel.
This parameter is used in
the DTE2 mode. In the
other modes, HCD-E1 sets
the buffer size
automatically.
AUTO
Automatic size selection.
32, 60, 104,144 Buffer size in bits corresponds
to FIFO lengths of ±16, ±30,
±52, and ±72 bits).
Default:
AUTO
Select AUTO (automatic FIFO buffer size selection), which
means that the FIFO buffer size is automatically selected, in
accordance with the jitter that must be tolerated at each data
rate.
When using the DCE and DTE1 clock modes, it is not
necessary to increase the FIFO buffer size. If the DTE2 mode
is used, and the jitter expected in a specific application is
higher than what can be tolerated when using the
automatically selected size, you can manually select a FIFO
buffer size greater than the AUTO size. The AUTO values are
listed in Table 1-1.