Specifications

Chapter 5 Troubleshooting and Diagnostics Installation and Operation Manual
5-4 Testing ASMi-31 ASMi-31 Ver. 3.0
Table 5-1. ASMi-31 Alarms (Cont.)
Alarm Description
NVRAM FAILED The internal modem NVRAM failed.
NO INTERFACE The modem does not detect any DTE interface module.
5.3 Testing ASMi-31
The user-controlled test functions of ASMi-31 consist of the loopback tests, BERT
and LEDs test. The purpose of these tests is to determine the source of a break
in the data flow.
The LINE CONFIG and DTE CONFIG menus are not available when any of the
diagnostic tests is running.
Before executing a test, note the following:
• Both local and remote ASMi-31 units must be configured and synchronized
properly to allow remote loopback activation.
• Only one loopback can be activated at a time, either on the local or remote
unit. The BER test can be run on both units simultaneously.
Running Loopback Tests
ASMi-31 supports activation of the local analog and remote digital loopbacks. The
loopbacks can be initiated via management software or via designated pins of the
V.24, RS-530 or V.35 interfaces. The loopbacks can be run from the local and
remote modems.
Running the Local Analog Loopback
The local analog loopback (LLB) checks the performance of the local ASMi-31
modem, the local DTE and connection between them (see
Figure 5-2 ). The LLB
can be performed separately on the local and remote modems.
Local
DTE
Data
Local ASMi-31
Data
Clock
Clock
Line
Interface
Transmit
Receive
Figure 5-2. Local Analog Loopback
Note