User guide

3-10 Solo E1 DSU User Guide—June 1998
3
In-band bit must match on the local and remote units. The factory setting
default is 4.
If changing Frame or Inband settings, change remote Þrst. The remote will
temporarily disappear. Then change the local unit to match the new
parameter and the remote unit will reappear.
Table 3-3 Menu-4 Main Config. Parameters
Parameter
(Default) Settings Description
UNIT Protect Mode
(Disabled)
Enabled
Disabled
Enabled—locks out access to the front
panel.
Disabled—you can run tests from the
front panel.
UNIT Idle code
(0XFF)
Hex value Choose any hex value between 0x00
and 0xFF
NET Framing
(CRC4 Enabled)
CRC4 Enabled
CRC4 Disabled
Unstructured
¥ CRC4 Enabled—uses Cyclic
Redundancy Check 4. Performs a
CRC calculation and uses 4 frame
bits to store the CRC over the content
of the frame.
¥ CRC4 Disabled—Does not count
CRCs.
¥ Unstructured does not support G.704
framing or CRC multi-framing.
Main/Alt Sync.
(NET/int)
net
int
data01
ext[2048]
Select the clock source for the E1
network transmitter. Specify the Main
clock source, then the Alternate. (Each
clock source offers the same options.)
If the network is the clock source,
select NET. If the clock source is DTE,
select DATA.
In-Band
Communications Bit
(4)
4
5
6
7
8
Disabled
Select a national bit (from 4 to 8) in
timeslot 0 for the in-band 4Kbps
communications link with the remote
unit. If this feature is disabled, all
national bits are set to 1.