Instruction manual

61200780L1-1C © 2004 ADTRAN, Inc. 110
ATLAS 800 Series System Manual Quad T1/PRI Option Module
Test
Loc LB Write security: 4; Read security: 5
Causes loopback on near-end (local) port (see Figure 3 on page 74). The
following options are available:
Remote LB Write security: 4; Read security: 5
Sends loopback code to remote CSU. The following options are available:
Pattern Write security: 4; Read security: 5
Test pattern to be transmitted out the port. The following options are available:
QRSS/RLB Results Write security: 3; Read security: 5
Pseudo-random pattern with suppression of excess zeros. Displays current
status of T1 tests including information regarding loopbacks and test patterns.
When displaying test pattern status, the display string is composed of pattern
sync status and errored seconds:
Options Description
Line
Metallic loopback
Payld
Payload loopback; framing and clocking are regenerated.
Options Description
AT&T Inband line
(ESF/D4) - Full 1.544 Mbps loopback of the signal received from the network
(metallic loopback).
ANSI FDL Line
(ESF) - Full 1.544 Mbps loopback of the signal received from the network.
Initiated through loopback activation transmission over the facility data link
(FDL).
ANSI FDL Pyld
(ESF) - 1.536 Mbps loopback of the payload data received from the network
maintaining bit-sequence integrity for the information bits by synchronizing
(regenerating) the timing. Initiated through loopback activation transmission
over the facility datalink (FDL).
Inband NIU
(ESF/D4) - Full 1.544 Mbps loopback of the signal received from the network
after passing through the T1 framer of the remote unit.
Options Description
All Ones
Framed ones
All Zeros
Framed zeros
Status Description
None
No sync.