Section 18. Troubleshooting Media Termination Points

A Media Termination Point (MTP) software device allows supplementary services, such as call park, call hold, call transfer, and conferencing, that are otherwise not available when calls are routed to an H.323 endpoint. Some H.323 gateways might require that calls use an MTP to enable supplementary call services, but Cisco IOS gateways do not, as a general rule.