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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)
OL-4803-01
Chapter 4 Cisco ATA-Supported MGCP Services
MGCP Embedded Events
Parameters in Commands Received from the Call Agent Processed by the
Cisco ATA
Parameters in Responses Received from the Call Agent Processed by the
Cisco ATA
MGCP Embedded Events
The embedded event action (E) can be used to reduce response time and increase bandwidth efficiency
of MGCP signaling.
Without embedded events, multiple MGCP messages would be required to achieve the same behavior
that one message with embedded events can achieve. Also, the time for a dial tone to sound after the user
goes off-hook is delayed when embedded events are not used in MGCP messages.
The Cisco ATA supports one level of embedded commands that are compliant with the MGCP 1.0 and
MGCP 1.0 NCS profiles. An embedded NotificationRequest that adheres to this limitation must not
contain another embedded NotificationRequest.
Table 4-8 Parameters in Commands Received from the Call Agent Processed by the Cisco ATA
Parameter Usage
ResponseAck CRCX, MDCX, DLCX, RQNT, AUEP, AUCX
CallId CRCX, MDCX, DLCX
ConnectionID MDCX, DLCX, AUCX
RequestIdentifier CRCX, MDCX, DLCX, RQNT
LocalConnectionOption CRCX, MDCX
ConnectionMode CRCX, MDCX
RequestedEvents CRCX, MDCX, DLCX, RQNT
SignalRequests CRCX, MDCX, DLCX, RQNT
NotifiedEntity CRCX, MDCX, DLCX, RQNT
DigitMap CRCX, MDCX, DLCX, RQNT
RequestedInfo AUEP, AUCX
QuarantineHandling CRCX, MDCX, DLCX, RQNT
DetectEvents CRCX, MDCX, DLCX, RQNT
RemoteConnectionDescriptor CRCX, MDCX
Table 4-9 Parameters in Responses Received from the Call Agent Processed by the Cisco ATA
Parameter Usage
ResponseAck DLCX, NTFY (1.0, NCS)
NotifiedEntity RSIP