Technical data

TraverseEdge 2020 Applications and Engineering Guide, Chapter 2: System Features
Page 2-10 Turin Networks Release 5.0.x
b. Split (terminate) one or both directions of a circuit
The TSC/RTU with which the test access feature must be interoperable is the Acterna® CENTEST™ test
system. It would also be desirable to be compatible with the Spirent™ (acquired Hekimian) REACT/
BRTU product (however, Spirent is known to charge a considerable sum for compatibility).
Test access may be on an in-service or out-of-service basis. In-service tests involve monitoring or routing
a copy of the active circuit to a TAP. The nine primary test access modes (3x monitor, 5x split, 1x Loop-
back), are shown in Figure 2-8 No test is active is referred to as the RELEASE state.
Figure 2-8 Nine Primary Test Access Modes
The test access paths (single or pairs of T1 and/or T3 ports) are defined through provisioning. Specific test
access modes and circuits to be tests are initiated by the 3
rd
party TSC/RTU using TL-1 over TCP/IP/
Ethernet. The TE-2020 uses a drop-and-continue connection to affect the Monitor mode and a normal
removal and creation of a new connection to affect the Split mode.
Since the TE-2020 product supports DS1, DS3, and OC-n interfaces, test access capability could be justi-
fied at all of these levels. OC-n test access is a forward looking but nascent capability from a deployment
perspective. Spirent offers both OC-3 and OC-12 test access capability. DS1 and DS3 are widely
deployed and, therefore, are the required initial test access port types supported on the TE-2020. OC-n is
designated as a future requirement.