Filter
Top Products
ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance
2-259
© 2000, ADC Telecommunications, Inc.
TAD-102
Page 2 of 5
The inband control code sequences will be recognized either in DS1 framed format (SF or ESF
framing) or in unframed format.
Table 102-1 contains a summary of loopback time-out and control codes. Notice that in the
Default Code column, the inband codes are shown left bit transmitted first and the ESF data link
codes are shown with the right bit transmitted first.
Table 102-1. HDSL Loopback Time-Out and Control Default Codes
NAME DEFAULT CODE DETECTION TIME COMMENTS
Arming (inband)
Arming (ESF)
11000
0001 0010 1111 1111
> 5 seconds
4 repetitions
The signal is sent inband or over
ESF data link. HDSL units in
disarmed state make the transition
to armed state. When the inband
arming code is detected, the
smartjack loopup state activates.
Activation (HLXC)
Activation (HRX)
Activation (HLXR)
1101 0011 1101 0011
1100 0111 0100 0001
1100 0111 0100 0010
> 3 seconds
> 3 seconds
> 3 seconds
The signal is sent inband. HDSL
units go to loopup state when they
are in armed state. Loopup is
activated for selected units.
Deactivation (all
HDSL units)
1001 0011 1001 0011 > 5 seconds The signal is sent inband. Units in
loopup state go back to armed state.
Loopup time-out
disable
1101 0101 1101 0110 > 3 seconds Disable loopup time-out. Active
loopbacks stay up until deactivation
or disarm code is received.
Disarming (inband)
Disarming (ESF)
11100
0010 0100 1111 1111
> 5 seconds
4 repetitions
The signal is sent inband or over
ESF data link. HDSL units are
disarmed.
Arming time-out n/a 2 hours An armed HDSL unit goes to
disarmed state.
Loopup time-out n/a Programmable
from Version D
HLXC
An HDSL unit in loopup goes to
armed state.
Note: All codes are programmable.