Oct55 Test Pattern With Ami Line Code; Loopback Operation - ADC HiGain H2TU-C-202 User Manual

Testing
OCT55 T P
EST
The OCT 55 test pattern can be used in unframed mode to stress the system and verify data integrity. In an SF or
ESF framing mode, excessive zero anomalies may occur, which causes the H2TU-C to report ES, SES and UAS
errors according to ANSI T1.231-1997.
L O
OOPBACK PERATION
HiGain HDSL2 has a family of loopback options for analyzing circuit functionality. The loopback signal is
transmitted and returned to the sending device for comparison. This allows you to verify the integrity of the
HDSL2 channels to the H2TU-C, the H2TU-C DSX-1 interface and the DS1 channels to the customer. Loopback
options include:
•
Generic Loopback (GNLB) options, including the SmartJack (SMJK) option (see
•
Special Loopback (SPLB) options (see
command tables:
–
Addressable Repeater Loopback commands: A2LB (see
Commands (A2LB)," on page
– Addressable Repeater Loopback commands: A3LB, A4LB
Loopback commands can be initiated by:
•
Selecting the loopback type using the MODE and SEL buttons on the H2TU-C front panel (or the Manual
Loopback button on the H2TU-R)
• Selecting the loopback type from the Monitor menu when connected to the craft port of the H2TU-C or
H2TU-R
•
Entering the loopback code into the test equipment connected to the H2TU-C or H2TU-R
HiGain HDSL2 only supports one active loopback. However, SmartJack loopback can be
present along with one other network loopback.
42
AMI L
ATTERN WITH
"Special Loopback Commands" on page 45
48)
C
INE ODE
Table 22, "Addressable Repeater Loopback
(Table 23 on page
April 21, 2000
152-202-115-04, Revision 04
Table 21 on page 44)
and in the following
50)
H2TU-C-202 List 1E