Pulse O3-4D1L3 U2 Manual page 19

DS1 Loopback
The O3-4D1L3 can recognize in-band and ESF data link loopback codes as shown in
Figure 8.
To respond to DS1 loopbacks, the O3-4D1L3 must be provisioned as an NT (CPE-side)
unit (LT is default), have its loopbacks enabled (disabled is default), and be provisioned
for either ESF (default) or SF operation. When provisioned for NT and ESF operation, the
O3-4D1L3 will respond to either in-band or ESF data link (out-of-band) loopback codes;
when provisioned for NT and SF operation, the unit will only respond to in-band loopback
codes. See Table 9.
OC3
Figure 8. DS1 Loopbacks
Table 9. Loopback Requests
A. SF Configuration
In-Band Loopback Code
Activate (Network)
Deactivate (Network)
AIS (Deactivate)
B. ESF Configuration
In-Band Loopback Code
Activate (Network)
Deactivate (Network)
AIS (Deactivate)
ESF Data Link Loopback Code
Activate (Line)
Deactivate (Line)
Universal Deactivate
AIS (Deactivate)
19
O3-4D1L3
DS1
Side
11000 (2 in 5)
11100 (3 in 5)
All Ones
11000 (2 in 5)
11100 (3 in 5)
All Ones
00001110 11111111
00111000 11111111
00100100 11111111
All Ones
O3-4D1L3 U2
1631, Issue 4, October 2009
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