Specifications

8-4
Reference Guide
Model No.
Running Head
User Card Diagnostics System Testing and Diagnostics
8.3.3 Data Diagnostics
Data diagnostics support varies among data cards. Generally, data card diagnostics supported
include the setting of various levels of loopbacks toward the network or the attached DTE
equipment. Other support includes the ability to generate and respond to industry-standard
loop-up and loop-down codes that are compatible with DDS, V.54 and/or Fractional T1 (FT1)
formats. The DS0-DP data card generates and detects DS0-DP loopback codes. The table
below shows detailed information on the diagnostic capabilities of the Data cards.
EIA530
HSU 2-port
V.35 HSU
2-port
EIA530/V.35
HSU 4-port
SRU
OCU-DP
2/5/10-port
DS0-DP
4-port
Loopbacks
On-Card loopbacks
Toward DTE Yes Yes Yes Yes Yes Yes
Toward Network Yes Yes Yes Yes Yes Yes
In-Band loopback
Code Generation
Latching DDS-OCU Yes Yes Yes Yes Yes Yes
Latching DDS-DSU Yes Yes Yes Yes No Yes
Latching DDS-CSU Yes Yes Yes Yes Yes Yes
Latching DDS-DS0 Yes Yes Yes No Yes Yes
ITU (CCITT) V.54 Yes Yes Yes No No No
ANSI Fractional T1
(FT1)
Yes Ye s Yes N o No No
Control Lead
Handling
Set CTS Yes Yes Yes Yes N/A N/A
Set RLSD Yes Yes Yes Yes N/A N/A
Set DSR Yes Yes Yes No N/A N/A
Monitor RTS Yes Yes Yes Yes N/A N/A
Monitor DTR Yes Yes Yes No N/A N/A