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Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
OL-8723-19
Chapter 15 Diagnostic Tests
Network Loopback Test for Network-based Call Signaling/Media Gateway Control Protocol Endpoints
Dedicated Test Trunk Group
The Cisco BTS10200 Softswitch allows NCS/MGCP endpoints in a trunk group to be provisioned as a
test trunk group with certain test attributes.
The test attributes consist of whether the incoming calls arriving on these test trunk groups will trigger
the Cisco BTS10200 Softswitch to perform call completion via Network Loopback (NLB) or Network
Continuity Test (NCT) method toward the eMTA. Hence, the category of the test is pre-provisioned on
these incoming test dedicated trunk groups—all calls from a particular test trunk group invoke the same
test category toward the eMTAs while calls from another test trunk group perform a different test
category. The call from the testing device addresses the eMTA directory number (DN) as any regular
digit that can be dialed.
The called party number format is:
<Test-data>
Where:
<Test-data> = DN (for example, the NCS/MGCP dialed digits signaled to the Cisco BTS10200
Softswitch are in the form of a 10-digit DN such as 2145261234, or <TG>TM> (Trunk group and trunk
member)
The steps for configuring the originating trunk group are:
Step 1
Add a trunk group for the testing device as CAS trunk group (TRUNK-GRP::TG-TYPE=CAS).
Step 2
Associate the trunk group to CAS-TG-PROFILE specific to network loopback test origination type
(CAS-TG-PROFILE::TEST-LINE=Y;
CAS-TG-PROFILE::TEST-LINE-TYPE=NLB-LINE/NCT-LINE/NLB-TRUNK/NCT-TRUNK.
Step 3
Add all test lines in the testing device as trunk termination.
Shared Test Trunk Group
In addition to dedicated test trunk groups, the BTS 10200 allows a shared test trunk group, where the
category of the test to be run is specified by the test-prefix. BTS 10200 allows a test trunk group to be
associated with a test dial plan. The test trunk group can be either the IP or CAS TDM trunks. Incoming
calls from the network on these trunk groups will be analyzed according to a pre configured test dial
plan. The following is the format of dialed digits for these incoming test calls.
Called party number format:
<Test-prefix><Test-data>
Where:
•
<Test-prefix>
is a string of digits that denote the test category. Operator must configure the
definition (recommended as a pattern of 1 to 6 digits, the BTS10200 Softswitch will perform the
longest match) of the test prefix and its length, whether it is an IP or TDM testing. If it is TDM
testing, the traditional 1xx test type value is expected or the general TDM test category needs to be
specified (for example, 199) when the route out DN testing is going to be used.
For example, test-prefix 152 may denote NLB IP testing, or 105 may convey the TDM 105 test-type,
or 199 may be defined to specify the TDM route out DN testing, or 153 is the configured prefix for
NCT.
•
<Test-data>
is a string that depends on the test-prefix content.