ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

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 102-1contains 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)

11000

> 5 seconds

The signal is sent inband or over

 

 

 

ESF data link. HDSL units in

Arming (ESF)

0001 0010 1111 1111

4 repetitions

disarmed state make the transition

to armed state. When the inband

 

 

 

 

 

 

arming code is detected, the

 

 

 

smartjack loopup state activates.

 

 

 

 

Activation (HLXC)

1101 0011 1101 0011

> 3 seconds

The signal is sent inband. HDSL

 

 

 

units go to loopup state when they

Activation (HRX)

1100 0111 0100 0001

> 3 seconds

are in armed state. Loopup is

activated for selected units.

 

 

 

Activation (HLXR)

1100 0111 0100 0010

> 3 seconds

 

 

 

 

 

Deactivation (all

1001 0011 1001 0011

> 5 seconds

The signal is sent inband. Units in

HDSL units)

 

 

loopup state go back to armed state.

 

 

 

 

Loopup time-out

1101 0101 1101 0110

> 3 seconds

Disable loopup time-out. Active

disable

 

 

loopbacks stay up until deactivation

 

 

 

or disarm code is received.

 

 

 

 

Disarming (inband)

11100

> 5 seconds

The signal is sent inband or over

 

 

 

ESF data link. HDSL units are

Disarming (ESF)

0010 0100 1111 1111

4 repetitions

disarmed.

 

 

 

 

 

Arming time-out

n/a

2 hours

An armed HDSL unit goes to

 

 

 

disarmed state.

 

 

 

 

Loopup time-out

n/a

Programmable

An HDSL unit in loopup goes to

 

 

from Version D

armed state.

 

 

HLXC

 

 

 

 

 

Note: All codes are programmable.

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© 2000, ADC Telecommunications, Inc.