300-070 Question #350: Real Exam Question with Answer & Explanation

The correct answer is A: Configure unicast MOH or tone on hold instead of multicast MOH.. When a Media Termination Point (MTP) is inserted into a call leg, it creates a unicast RTP stream between endpoints. Multicast MOH cannot be delivered into a unicast stream - the MTP resource has no way to bridge multicast audio to a unicast leg. Unicast MOH (or tone on hold), ho

Question

Which task must be completed so that the caller hears MOH instead of silence when the MTP resource gets invoked at one of the call legs?

Options

AConfigure unicast MOH or tone on hold instead of multicast MOH.
BConfigure multicast MOH instead of unicast MOH or tone on hold.
CConfigure software DSP instead of hardware DSP.
DConfigure hardware DSP instead of software DSP.

Explanation

When a Media Termination Point (MTP) is inserted into a call leg, it creates a unicast RTP stream between endpoints. Multicast MOH cannot be delivered into a unicast stream - the MTP resource has no way to bridge multicast audio to a unicast leg. Unicast MOH (or tone on hold), however, establishes a dedicated unicast stream to the held party through the MTP, so the caller hears audio instead of silence. Multicast MOH only works in scenarios where the phone itself can join the multicast group without an MTP in the path.

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