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Cisco BTS 10200 Softswitch Troubleshooting Guide, Release 5.0.x
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Chapter 15 Diagnostic Tests
PSTN Trunk Testing
Far End Originating Test Line
The far end originating test line (OTL) may be located on a different switch product as well as on a
different carrier (for example, ILEC, IXC, CLEC). The far end OTL connects to the near end
Cisco BTS 10200 softswitch TTL through the TUT. This section discusses the following
Cisco BTS 10200 far end originating test line information:
•
•
•
•
•
Trunk Access and Test Termination Number Format, page 15-118
•
Trunk Under Test Outpulsing, page 15-118
Function
The OTL originates all test calls towards the Cisco BTS 10200 softswitch. The OTL may be part of an
automated trunk test system (for example, CAROT) that will select trunks, make test calls, conduct tests,
record measurements and report marginal or inferior trunk performance.
Test Equipment
Test equipment capable of seizing the test line, outpulsing digits, recognizing supervision, and
supporting 1XX tests. Although Cisco does not recommend any vendor, SAGE Instruments 930 or 935
series test equipment with the proper options are good choices.
Test Line
OTL requirements are specific to the Far End switch product as well as to far end service
provider/enterprise test methods and procedures. That subject, however, is outside the scope of this
document.
Trunk Access
This is specific to the far end switch product and outside the scope of this document.
Trunk Access and Test Termination Number Format
This is specific to the far end switch product and outside the scope of this document.
Trunk Under Test Outpulsing
The far end switch translates the dialed digits into a digit string for outpulsing. The Cisco BTS 10200
softswitch expects to receive destination digits depicted in
. Since the digits might be sent
through SS7, MF, or DTMF, only the actual destination digits are depicted.
