User guide

132 RealCT Direct API Developer Guide
Chapter 4: E1 Networking
Placing Calls over an E1 Line
Testing your application over a live E1 line gives you a
controlled environment and requires no special knowledge of
the protocols. If the application passes a few tests such as
making simultaneous calls or consecutive calls on the same line,
the application will probably work for real calls. However, when
testing the application over a real E1 line, the telephone
company controls the environment so there is little chance to
test error conditions. Before testing an application on a live E1
line you should use AccuSpan to eliminate as many error
conditions as possible.
Using an E1 Bulk Call Generator
Using an E1 bulk call generator is a good way to stress-test your
application. Most E1 bulk call generators allow at least four
trunks, or 120 lines, to place calls simultaneously. However,
using a call generator should not replace other tests,
particularly tests over a real line. The bulk call generator
usually does not provide a way of testing error handling since
they follow scripts that you determine and send the correct
signals on the line. They might also handle exceptions and
timing issues differently than your CO.