11/4/99 12:34 Frequently Asked Questions 4-1
Chapter 4Troubleshootingand Diagnostics4.1 General
This chapter contains procedures for performing system diagnostic tests for
ASM-20. Use the test procedures provided in this chapter to:
• Verify normal system operation
• Isolate faulty equipment in the event of failure.
Tests are activated by control push buttons on the ASM-20 front panel and
monitored via LED indicators. For a description of the ASM-20 controls and
indicators and their functions, see Chapter 3, Operation.
4.2 Frequently Asked Questions
Q. How is the new version of ASM-20 different from the older version?
A. ASM-20 has been improved in order to get CE mark approval and has
some new features. A different ordering name, ASM-20-2, was given to the
newer version. Presently, any order received for ASM-20 or ASM-20-2 will
be delivered as ordered until the stock of existing ASM-20 products is
depleted. After the stock is depleted, orders for any version will be delivered
with the new ASM-20-2 boards only.
The following table describe the differences between the old ASM-20 and
the new version.
Table 4-1 Differences in Versions
ASM-20 ASM-20-2
Non-modular interfaces (V.24,
X.21 etc.); part of the main board
Modular interfaces
Two ordering options for
synchronous rates:
32 kbps - 128 kbps
32 kbps - 144 kbps
All synchronous rates from
19.2 kbps - 256 kbps.
No Ethernet support Ethernet built-in bridge