Question

You are deploying media resources on an IOS XE CUBE that must transcode between G.711 and Opus for calls between a legacy PBX and a cloud calling provider. The gateway is a Cisco 4451-X ISR with a PVDM4 module installed. During design review, a colleague proposes using Local Transcoding Interface (LTI) rather than the traditional SCCP-controlled DSP farm profile. Which statement correctly describes a key characteristic of the LTI approach for provisioning these transcoding resources on the CUBE?

Accepted Answer

LTI allows CUBE to control the PVDM4 DSP resources directly without registering the DSP farm profile to CUCM via SCCP

Answer

LTI requires the DSP farm profile to register to CUCM as a media resource before CUBE can invoke transcoding

Answer

LTI performs transcoding entirely in software on the route processor CPU and does not use the PVDM4 DSPs

Answer

LTI can only be used for conferencing (CFB) resources and cannot provide transcoding services for SIP-to-SIP calls