Chapter 3 - Front Panel Operating Instructions HCD-E1
Installation & Operation Manual
3-10 Configuration Parameters
Table 3-3 Sublink Configuration Parameters
Designation Function Values Configuration Guidelines
FRAME
Selects the framing mode for the
sublink
UNFRAMED The E1 sublink
transparently transfers the
incoming data stream on
a bit-by-bit basis. This
allows transfer of
unframed 2048 kbps data
streams, or of data
streams using any framing
method (standard or
proprietary).
G732N Two frames per
multiframe. Time slot 16
is passed transparently.
Default: G732N
Select the framing mode specified for use in your
network.
When transferring unstructured data streams, or data
streams with proprietary framing, select UNFRAMED.
To select UNFRAMED, you have to assign all the 32 time
slots.
SYNC
(does not
appear in
UNFRAMED
mode)
Permits to reduce the time
required for the E1 sublink to
return to normal operation after
local loss of synchronization
CCITT Complies with ITU-T Rec. G. 732
FAST After 1 second
62411 Similar to the requirements of
AT&T TR-62411 (after
10 seconds)
Default: CCITT
Select CCITT, unless your application has special
requirements
CRC-4
(does not
appear in
UNFRAMED
mode)
Enables the generation of check
bits (in accordance with the
CRC-4 polynomial specified by
ITU G.704) for the frames
transmitted on the E1 sublink,
and the checking of check bits
carried by the frames
NO CRC-4 option disabled
YES CRC-4 option enabled
Default: NO
Select YES, unless HCD-E1 is connected to equipment
that does not support this capability.
