Troubleshooting guide

9-2
Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
OL-5169-01
Chapter 9 Troubleshooting Cisco Media Gateways
MGCP on Cisco IOS Software
MGCP on Cisco IOS Software
The Media Gateway Control Protocol (MGCP) runs on Cisco IOS software and the Cisco BTS 10200
Softswitch. The Cisco BTS 10200 Softswitch uses MGCP to control media gateways from external call
control elements. A media gateway is a network element that provides conversion between audio signals
carried on telephone circuits and data packets carried over the Internet or other packet network.
MGCP provides a call control architecture where the call control intelligence is outside the gates and
handled by external call control elements. The MGCP commands supported include:
• Create Connection—Used by the Cisco BTS 10200 Softswitch to allocate and connect the bearer
channels.
• Modify Connection—Used by the Cisco BTS 10200 Softswitch to change the parameters
associated to a previously established connection.
• Notification Request—Used by the Cisco BTS 10200 Softswitch to instruct a gateway to watch for
specific events, such as hook actions or DTMF tones on a specified end point.
• Notify—Used by the gateway to inform the Cisco BTS 10200 Softswitch when the requested events
occur.
• Audit Endpoint—Used by the Cisco BTS 10200 Softswitch to audit the status of an endpoint.
• Audit Connection—Used by the Cisco BTS 10200 Softswitch to audit the status of a connection.
• Restart in Progress—Used by the gateway to notify the Cisco BTS 10200 Softswitch that the
gateway or a group of endpoints managed by the gateway are being taken out of service or are being
put back in service.
DHCP on Cisco IOS Software
The Dynamic Host Configuration Protocol (DHCP) runs on Cisco IOS software. The Cisco IAD2421
serves as a DHCP server to retrieve IP addresses. This allows subscribers to connect their PCs to the
Cisco IAD2421 without the need for any IP address management, minimizing operational overhead and
costs associated with device configuration. For information on DHCP, see the DHCP information in the
Cisco IOS Configuration Fundamentals Configuration Guide for your Cisco IOS software release.
Cisco MGX8850
Two different configurations of this platform are supported. The configurations are as follows:
• MGX8850/PXM1/RPM-PR/VISM-PR/SRM
• MGX8850/PXM45/RPM-XF/VISM-PR/SRM-E
The first configuration—MGX8850/PXM1/RPM-PR/VISM-PR/SRM—includes the following:
• 19-inch rack mount. Redundant PXM1 (1.2.01)
• 24 I/O+4 SRM slot, PXM1, PXM-UI,
• MGX-VISM-8T1 (2.2.0)
• VISM-VOIP-G711
• MGX-SRM-3T3/C
• MGX-BNC-3T3-M - backcard