READ Free Dumps For Cisco- 400-051
| Question ID 13046 | Refer to the exhibit.
Which option describes how this Cisco IOS SIP gateway, with an analog phone attached to
its FXS port, handles an incoming informational SIP 180 response message with SDP?
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| Option A | It will enable early media cut-through.
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| Option B | It will generate local ring back.
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| Option C | It will do nothing because the message is informational.
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| Option D | It will terminate the call because this is an unsupported message format.
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| Option E | It will take the FXS port offhook.
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| Correct Answer | B |
Explanation
| Question ID 13047 | Refer to the exhibit.
Which option describes the method used by Cisco IOS gateways to tunnel QSIG signaling
messages in H.323 protocol?
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| Option A | H.323 Annex M1
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| Option B | H.323 Annex M2
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| Option C | H.323 Annex A
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| Option D | ISDN Generic Transparency Descriptor
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| Option E | H.450.1
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| Correct Answer | D |
Explanation Explanation: H.323 is an umbrella recommendation that encompasses various ITU-T recommendations, primarily recommendations H.225.0 and H.245 (basic communication capabilities) and recommendation H.450.1 (generic functional protocol for the support of supplementary services). Tunneling QSIG over H.323 is specified in H.323 Annex-M1. However, Cisco IOS Software H.323 QSIG tunneling does not implement Annex-M1 (as the Cisco Unified Communications Manager H.323 implementation does). Instead it uses the ISDN Generic Transparency Descriptor (GTD) to transport QSIG messages in the corresponding H.225 message to another Cisco gateway device on the other side of the network. Reference: http://www.cisco.com/c/en/us/solutions/collateral/enterprise- networks/empowered-branch-solution/white_paper_c11_459092.html