300-070 · Question #169
Refer to the exhibit. An engineer is trying to determine the status of the ISDN D Channel on a new PRI circuit, types in the show isdn status command, and sees this output. Which two pieces of…
The correct answer is D. The D channel is working correctly. E. No active calls are established. From the 'show isdn status' output, two conclusions can be drawn: (D) The D channel is working correctly - indicated by Layer 1 status ACTIVE, Layer 2 TEI ASSIGNED / MULTIPLE_FRAME_ESTABLISHED, and Layer 3 showing initialized state; and (E) No active calls are established - the…
Question
Refer to the exhibit. An engineer is trying to determine the status of the ISDN D Channel on a new PRI circuit, types in the show isdn status command, and sees this output. Which two pieces of information can be determined from this output? (Choose two.)
Exhibit
Options
- AThe provider is using the 5ESS protocol.
- BThere are four channels.
- CThe connection to the Cisco Unified Communications Manager has been established.
- DThe D channel is working correctly.
- ENo active calls are established.
How the community answered
(44 responses)- A5% (2)
- B7% (3)
- C16% (7)
- D73% (32)
Explanation
From the 'show isdn status' output, two conclusions can be drawn: (D) The D channel is working correctly - indicated by Layer 1 status ACTIVE, Layer 2 TEI ASSIGNED / MULTIPLE_FRAME_ESTABLISHED, and Layer 3 showing initialized state; and (E) No active calls are established - the output shows 0 active calls in the call reference section. The output does not reliably reveal the ISDN switch type (5ESS vs others) unless the switch-type is explicitly displayed. The number of channels and CUCM connectivity are not determinable from ISDN D channel status alone.
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