MGCP enables the remote control and management of voice and data communications devices at the edge of multiservice IP packet networks. Because of its centralized architecture, MGCP overcomes the distributed configuration and administration problems inherent in the use of protocols such as H.323. MGCP simplifies the configuration and administration of voice gateways and supports multiple (redundant) call agents, eliminating the potential for a single point of failure in controlling the Cisco IOS gateway in the network.

MGCP can be configured as a master or slave protocol to ensure that the gateway receives and executes the configuration, control, and management commands that are issued by Cisco Unified Communications Manager. The MGCP gateway is under the control of Cisco Unified Communications Manager.

MGCP uses endpoints and connections to construct a call. Endpoints are sources of or destinations for data and can be physical or logical locations identifying a device. The voice ports on the Cisco MGCP gateway are its endpoints. Connections can be point-to-point or multipoint. Cisco Unified Communications Manager acts as the MGCP call agent, managing connections between endpoints and controlling how the Cisco IOS gateway functions.

The figure below shows a typical MGCP gateway that is controlled by an MGCP call agent.

Figure 1

MGCP Gateway Controlled by Cisco Unified Communications Manager

The MGCP gateway receives most of its required configuration from the call agent. To configure an MGCP gateway, you simply identify the Cisco Unified Communications Manager server associated with the gateway and identify the gateway to the call agent. The MGCP gateway handles the translation between voice signals and the packet network and interacts with the Cisco Unified Communications Manager server. The server performs signal and call processing.

This section describes how to configure Cisco Unified Communications Manager failover capabilities on the MGCP gateway.

• Switchover
  
• Switchback
  
• MGCP Gateway Fallback
  
• MGCP Gateway Registration with Cisco Unified Communications Manager
  
• Benefits of Cisco Unified Communications Manager Switchover and MGCP Gateway Fallback
  

Cisco Survivable Remote Site Telephony (SRST) provides Cisco Unified Communications Manager with fallback support for Cisco IP phones that are attached to a Cisco router on your local network. Cisco SRST enables routers to provide call-handling support for Cisco IP phones when they lose connection to remote primary, secondary, or tertiary Cisco Unified Communications Manager installations or when the WAN connection is down.

MGCP gateway fallback is a different feature than SRST, and when MGCP gateway fallback is configured as an individual feature, it can be used by a PSTN gateway if you configure H.323 (or some other voice application) as a backup service. To use SRST as your fallback mode on an MGCP gateway, you must configure SRST and MGCP fallback on the same gateway. MGCP and SRST have had the capability to be configured on the same gateway since Cisco IOS Release 12.2(11)T.

• Cisco SRST Description
  
• Configuring MGCP Gateway Fallback and Cisco SRST
  
• Enabling SRST on an MGCP Gateway
  

When you configure MGCP gateways to support Cisco Unified Communications Manager, you can use a centralized TFTP boot directory on a host device in your network to automatically download most of the configuration in the XML files. Each MGCP gateway in your VoIP network has an associated gateway-specific configuration that is stored in the centralized TFTP boot directory. A tailored XML file can be created and downloaded from the TFTP server to your designated MGCP gateway. The Cisco Unified Communications Manager server can be configured concurrently as a TFTP server.

When you make changes to the configuration in the database, a message is sent by Cisco Unified Communications Manager to the affected MGCP gateway, instructing the gateway devices to download the new XML configuration file. Each device has an XML parser that interprets the XML file according to its device-specific requirements. Cisco MGCP gateways, for example, translate the content of the XML file into specific Cisco IOS commands for local execution.

When an MGCP gateway is first started up, it is preconfigured with the following information or it obtains the information through Dynamic Host Configuration Protocol (DHCP):

• A unique device identifier, which can be either of the following:
  • Specific device name on the Cisco MGCP gateway
  • MAC address of the device for gateways that are not using Cisco IOS software
• IP address of the TFTP server in the network and routing information required for access
• Sufficient information for configuration of an IP interface on the device

With this configuration information available at startup, the MGCP gateway downloads the XML file from the TFTP server. The gateway parses the XML file, converts the information to appropriate Cisco IOS configuration commands, and configures itself to run in the VoIP network. Finally, the gateway registers itself with Cisco Unified Communications Manager using an RSIP message. At that point, the MGCP gateway is ready for service in the network.

After a successful configuration download, the MGCP gateway saves the running configuration to nonvolatile random-access memory (NVRAM), which updates the startup configuration. Any manually-added configuration parameters are also saved to NVRAM if they were not previously saved. Manually-added configuration parameters are updates to the configuration that were made using the command-line interface (CLI). Manual configuration updates are separate from the automatic configuration updates made during the configuration download process.

In the event of a configuration failure, the MGCP gateway attempts to restore its current configuration by copying the startup configuration from NVRAM into the running configuration. Because this overwrites the running configuration, any manually-added configuration parameters could be lost if they were not saved to NVRAM before running the automatic configuration-download process.

Figure 3

Single-Point Configuration for Cisco MGCP Gateways

Multilevel Precedence and Preemption (MLPP) is a service that allows authorized users to preempt lower priority voice calls to targeted stations or fully subscribed shared resources such as TDM trunks or conference bridges. This capability ensures high-ranking personnel of communication to critical organizations and personnel during network stress situations such as a national emergency. MLPP enables the voice gateway to interoperate with other MLPP-capable networks for call preemption and precedence. MLPP is supported only for MGCP endpoints over T1 CAS (E&M wink start) and T1 PRI using the backhaul feature.

MLPP service applies only to the subscribers and network resources within a specific domain. Connections and resources for a call from an MLPP subscriber are marked with a precedence level and domain identifier. A call can only be preempted by calls of higher precedence from MLPP users in the same domain. The Cisco Communications Manager or defense switched network (DSN) switch sets the maximum precedence level of a subscriber at subscription time.

For more information about MLPP, see the "Multilevel Precedence and Preemption" chapter in the Cisco CallManager Features and Services Guide , Release 4.0(1).

• MLPP Call Treatment During Cisco Unified Communications Manager Switchover
  

The Music-on-Hold (MOH) feature enables you to subscribe to a music streaming service when you are using a Cisco IOS MGCP voice gateway. Music streams from an MOH server to the voice interfaces of on-net and off-net callers that have been placed on hold. Cisco Communications Manager supports the capability to place callers on hold with music supplied from a streaming multicast MOH server. This integrated multicast capability is implemented through the H.323 signaling in Cisco Communications Manager.

By means of a preconfigured multicast address on the gateway, the gateway can "listen" for Real-Time Transport Protocol (RTP) packets that are broadcast from a default router in the network and can relay the packets to designated voice interfaces in the network. Whenever a called party places a calling party on hold, Cisco Communications Manager requests the MOH server to stream RTP packets to the "on-hold" interface through the preconfigured multicast address. In this way, RTP packets are relayed to appropriately configured voice interfaces that have been placed on hold. When you configure a multicast address on a gateway, the gateway sends an Internet Gateway Management Protocol (IGMP) "join" message to the default router, indicating to the default router that the gateway is ready to receive RTP multicast packets.

Multiple MOH servers can be present in the same network, but each server must have a different Class D IP address, and the address must be configured in Cisco Communications Manager and the MGCP voice gateways.

1.    enable

2.    configure terminal

3.    interface ethernet slot /port

4.    ip address ip-address subnetmask

5.    no shutdown

6.    exit

7.    hostname name

8.    mgcp validate domain-name

9.    mgcp

10.    mgcp call-agent {ip-address | host-name} [port] [service-type type] [version version-number]

11.    mgcp dtmf-relay voip codec {all | low-bit-rate} mode {cisco| nse | out-of-band}

12.    ccm-manager mgcp

13.    exit

1.    show running-config

2.    show interfaces ethernet

3.    show mgcp

Router# show running-config
...
hostname voice-3640
!
...
mgcp
mgcp call-agent 10.0.0.21 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
!
ccm-manager mgcp
!
interface Ethernet0/1
 ip address 10.10.2.23 255.255.255.0
 half-duplex

Router# show interfaces ethernet 4/2
Ethernet4/2 is up, line protocol is up
 Hardware is cxBus Ethernet, address is 0000.0c02.d0ce (bia 0000.0c02.d0ce)
 Internet address is 10.10.7.1, subnet mask is 255.255.255.0
 MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255
 Encapsulation ARPA, loopback not set, keepalive set (10 sec)
 ARP type: ARPA, ARP Timeout 4:00:00
 Last input 0:00:00, output 0:00:09, output hang never
 Last clearing of "show interface" counters 0:56:40
 Output queue 0/40, 0 drops; input queue 0/75, 0 drops
 Five minute input rate 3000 bits/sec, 4 packets/sec
 Five minute output rate 0 bits/sec, 0 packets/sec
     4961 packets input, 715381 bytes, 0 no buffer
     Received 2014 broadcasts, 0 runts, 0 giants
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     567 packets output, 224914 bytes, 0 underruns
     0 output errors, 168 collisions, 0 interface resets, 0 restarts
     0 babbles, 2 late collision, 7 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

Router# show mgcp
MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE 
!MGCP call agent with IP address for Cisco Unified Communications Manager:
MGCP call-agent: 10.0.0.21 2427 Initial protocol service is MGCP, v. 0.1
MGCP block-newcalls DISABLED 
MGCP send RSIP for SGCP is DISABLED 
MGCP quarantine mode discard/step 
MGCP quarantine of persistent events is ENABLED 
!DTMF-relay voip codec parameters:
MGCP dtmf-relay voip codec all mode out-of-band 
MGCP dtmf-relay for VoAAL2 disabled for all codec types 
MGCP voip modem passthrough mode: CISCO, codec: g711ulaw, redundancy: DISABLED,
MGCP voaal2 modem passthrough mode: NSE, codec: g711ulaw 
MGCP TSE payload: 0 
MGCP Network (IP/AAL2) Continuity Test timer: 200 
MGCP 'RTP stream loss' timer: 5 
MGCP request timeout 500, MGCP request retries 3 
MGCP rtp unreachable timeout 1000 
MGCP gateway port: 2427, MGCP maximum waiting delay 3000 
MGCP restart delay 0, MGCP vad DISABLED 
MGCP simple-sdp DISABLED 
MGCP undotted-notation DISABLED 
MGCP codec type g711ulaw, MGCP packetization period 20 
MGCP JB threshold lwm 30, MGCP JB threshold hwm 150 
MGCP LAT threshold lmw 150, MGCP LAT threshold hwm 300 
MGCP PL threshold lwm 1000, MGCP PL threshold hwm 10000 
MGCP CL threshold lwm 1000, MGCP CL threshold hwm 10000 
MGCP playout mode is adaptive 60, 4, 200 in msec 
MGCP IP ToS low delay disabled, MGCP IP ToS high throughput disabled 
MGCP IP ToS high reliability disabled, MGCP IP ToS low cost disabled 
MGCP IP RTP precedence 5, MGCP signaling precedence: 3 
MGCP default package: line-package 
MGCP supported packages: gm-package dtmf-package trunk-package line-package 
hs-package rtp-package ms-package dt-package sst-packagc-package 
MGCP VoAAL2 ignore-lco-codec DISABLED
MGCP T.38 Fax is DISABLED

1.    enable

2.    configure terminal

3.    ccm-manager redundant-host {ip-address | DNS-name} [ip-address | DNS-name]

4.    ccm-manager switchback {graceful | immediate | schedule-time hh:mm | uptime-delay minutes}

5.    ccm-manager fallback-mgcp

6.    call application alternate

7.    exit

8.    ccm-manager switchover-to-backup

Note	Effective with Cisco IOS Release 12.3(14)T, the call application alternate command has been replaced by the service command. You can use the service command cin all releases after Cisco IOS Release 12.3(14)T. Both commands are reflected in Step 4 .

1.    enable

2.    configure terminal

3.    ccm-manager fallback-mgcp

4.    call application alternate [application name]

5.    exit

1.    show running-config

2.    show ccm-manager

3.    show ccm-manager fallback-mgcp

Router# show running-config
...
ccm-manager switchback immediate
ccm-manager fallback-mgcp
ccm-manager redundant-host 10.0.0.50
ccm-manager mgcp
.
.
.
call application alternate DEFAULT
!

Router# show ccm-manager
MGCP Domain Name: router.cisco.com
Total number of host: 2
Priority        Status         Host
===================================================
Primary         Registered     10.0.0.201
First backup    Backup polling 10.0.0.50
Second backup   Undefined 
Current active Communications Manager: 10.0.0.201
Current backup Communications Manager: 10.0.0.50
Redundant link port:         2428
Failover Interval:           30 seconds
Keepalive Interval:          15 seconds
Last keepalive sent:         00:20:18 (elapsed time: 00:00:06)
Last MGCP traffic time:      00:20:18 (elapsed time: 00:00:06)
Last switchover time:        None
Switchback mode:             Immediate

Router# show ccm-manager fallback-mgcp
Current active Communications Manager:    10.00.71.29
MGCP Fallback mode:            Enabled/OFF
Last MGCP Fallback start time: 00:00:00
Last MGCP Fallback end time:   00:00:00

Perform this task to enable the POTS dial peers on your MGCP gateway to communicate with Cisco Unified Communications Manager.

When you have finished this procedure, the voice gateway is ready to communicate with Cisco Unified Communications Manager. It periodically sends out messages attempting to establish a connection. When the Cisco Unified Communications Manager configuration is complete, the connection should automatically establish itself. You should not have to make any further changes on the MGCP gateway.

Note

All dial-plan configuration elements are controlled by Cisco Unified Communications Manager and should not be configured on the MGCP gateway for MGCP-managed endpoints (that is, any endpoint with an application mgcpappcommand in its associated dial-peer). Do not use the destination-pattern or session target dial-peer configuration commands or the connection voice-port configuration command on the MGCP gateway, unless you are configuring MGCP gateway fallback. To configure MGCP gateway fallback, you must configure the H.323 dial peers with the destination-pattern and session target dial-peer configuration commands. Direct inward dial (DID) is required for T1/E1 PRI dial peers. Do not use the application mgcpapp command in dial peers that support PRI backhaul or BRI backhaul.

1.    enable

2.    configure terminal

3.    dial-peer voice tag pots

4.    application mgcpapp

5.    direct-inward-dial

6.    port slot /subunit/port

7.    exit

1.    show running-config

2.    show dial-peer voice

3.    show voice port

! FXO port
dial-peer voice 1 pots
 application mgcpapp
 port 1/0/0
!
! FXO port
dial-peer voice 2 pots
 application mgcpapp
 port 1/0/1
!
! FXS port
dial-peer voice 3 pots
 application mgcpapp
 port 1/1/0

ccm-manager switchback immediate
ccm-manager fallback-mgcp 
ccm-manager mgcp
!
controller T1 1/0
 framing esf
 linecode b8zs
 ds0-group 1 timeslots 1-24 type e&m-wink-start
!
voice-port 1/0:1
!
dial-peer voice 1 pots
 application mgcpapp
 destination-pattern 91..........
 port 1/0:1

dial-peer voice 1 pots 
 application mgcpapp
 destination-pattern 555-1212
 port 1/0/0

dial-peer voice 2 pots 
 application mgcpapp
 destination-pattern 527.... 
 prefix 527 
 port 1/1/1

dial-peer voice 555 voip 
 application mgcpapp
 destination pattern 555...
 incoming-called-number 444...
 session-target ipv4:172.20.21.8
 codec g711ulaw

Router# show dial-peer voice 1000
VoiceEncapPeer1000
information type = voice,
description = `',
tag = 1000, destination-pattern = `',
answer-address = `', preference=0,
numbering Type = `unknown'
group = 1000, Admin state is up, Operation state is down,
incoming called-number = `', connections/maximum = 0/unlimited,
DTMF Relay = disabled,
huntstop = disabled,
in bound application associated: 'mgcpapp'
 
out bound application associated: ''
dnis-map = 
permission :both
incoming COR list:maximum capability
outgoing COR list:minimum requirement
type = pots, prefix = `',
forward-digits default
session-target = `', voice-port = `',
direct-inward-dial = disabled,
digit_strip = enabled,
register E.164 number with GK = TRUE
Connect Time = 0, Charged Units = 0,
Successful Calls=0, Failed Calls=0, Incomplete Calls=0
Accepted Calls = 0, Refused Calls = 0,
Last Disconnect Cause is "",
Last Disconnect Text is "",
Last Setup Time = 0.

Router# show voice port 1/0/0
Foreign Exchange Office 1/0/0 Slot is 1, Sub-unit is 0, Port is 0
Type of VoicePort is FXO
Operation State is DORMANT
Administrative State is UP
No Interface Down Failure
Description is not set
Noise Regeneration is enabled
Non Linear Processing is enabled
Non Linear Mute is disabled
Non Linear Threshold is -21 dB
Music On Hold Threshold is Set to -38 dBm
In Gain is Set to 0 dB
Out Attenuation is Set to 3 dB
Echo Cancellation is enabled
Echo Cancellation NLP mute is disabled
Echo Cancellation NLP threshold is -21 dB
Echo Cancel Coverage is set to 8 ms
Playout-delay Mode is set to default
Playout-delay Nominal is set to 60 ms
Playout-delay Maximum is set to 200 ms
Playout-delay Minimum mode is set to default, value 40 ms 
Playout-delay Fax is set to 300 ms
Connection Mode is normal
Connection Number is not set
Initial Time Out is set to 10 s
Interdigit Time Out is set to 10 s
Call Disconnect Time Out is set to 60 s
Ringing Time Out is set to 180 s
Wait Release Time Out is set to 30 s
Companding Type is u-law
Region Tone is set for US
Analog Info Follows:
Currently processing none
Maintenance Mode Set to None (not in mtc mode)
Number of signaling protocol errors are 0
Impedance is set to 600r Ohm
Station name None, Station number None
Translation profile (Incoming):
Translation profile (Outgoing):
Voice card specific Info Follows:
Signal Type is loopStart
Number Of Rings is set to 1
Supervisory Disconnect is inactive
Answer Supervision is inactive
Hook Status is On Hook
Ring Detect Status is inactive
Ring Ground Status is inactive
Tip Ground Status is inactive
Dial Type is dtmf
Digit Duration Timing is set to 100 ms
InterDigit Duration Timing is set to 100 ms
Pulse Rate Timing is set to 10 pulses/second
InterDigit Pulse Duration Timing is set to 750 ms
Percent Break of Pulse is 60 percent
GuardOut timer is 2000 ms

1.    show running-config

2.    show ccm-manager config-download

Router# show running-config
...
ccm-manager switchback immediate
ccm-manager fallback-mgcp
ccm-manager redundant-host 10.10.10.1
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server 10.10.1.10
ccm-manager config
!

Router# show ccm-manager config-download
Configuration Auto-download Information
=======================================
Current version-id: {1645327B-F59A-4417-8E01-7312C61216AE}
Last config-downloaded:00:00:49
Current state: Waiting for commands
Configuration Download statistics:
        Download Attempted             : 4
          Download Successful          : 4
          Download Failed              : 0
        Configuration Attempted        : 1
          Configuration Successful     : 1
          Configuration Failed(Parsing): 0
          Configuration Failed(config) : 0
Last config download command: New Registration

1.    enable

2.    configure terminal

3.    ccm-manager music-on-hold

4.    ccm-manager music-on-hold bind interface

5.    exit

1.    show running-config

2.    show ccm-manager music-on-hold

Router# show running-config
...
ccm-manager redundant-host 10.0.0.21 
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server 10.0.0.21 
ccm-manager config
!

Router#
 show ccm-manager music-on-hold
Multicast      RTP      Packets       Call                Incoming
Address        Port     In/Out        ID       Protocol   Interface
10.10.20.22    16256    3000/3000     1        IGMP       fe0/0

Perform this task to configure the MGCP package capability for MLPP.

Note	If you downloaded the default configuration file from TFTP, you do not need to manually configure MLPP on the MGCP gateway. The MLPP configuration is contained in the default configuration.

Before You Begin

• Cisco IOS Release 12.3(11)T or later
• Cisco Unified Communications Manager 4.0 (formerly known as Cisco CallManager 4.0) or later
• DSPWare 4.0
• Telogy DSP4 (Catalyst 6000 switches)
• Preemptions and precedences should be configured in Cisco Communications Manager. Interfaces, dial peers, voice ports, controllers, framing, and line codes should also be configured.
• Cisco Catalyst 6500 series and Cisco 7600 series Communication Media Module (CMM) requires WS-SVC-CMM-6T1 port adapter.

Note

Supported only for MGCP endpoints over T1 CAS (E&M wink start) and T1 PRI (backhaul). Supported only by Cisco Communications Manager; does not work with other call agents. Conferenced call legs are not supported for preemption with Cisco Communications Manager. H.323, FXS, and FXO endpoints are not supported. Not supported for calls that originate or terminate in the gateway when the gateway is in H.323 fallback mode.

1.    enable

2.    configure terminal

3.    mgcp package-capability pre-package

4.    exit

When the gateway is in fallback mode, the precedence digit must be stripped from the dial string for T1 CAS calls. Perform this task to configure SRST to handle stripping the precedence digit.

Note	For information on configuring digit stripping options for your specific dial plan, see the "Setting Up Call Handling" chapter in the Cisco Survivable Remote Site Telephony Version 3.2 System Administration Guide .

1.    enable

2.    configure terminal

3.    call-manager-fallback

4.    ip source-address ip-address [port port] [any-match | strict-match]

5.    max-dn max-directory-numbers

6.    max-ephones max-phones

7.    dialplan-pattern tag pattern extension-length length [extension-pattern extension-pattern] [no-reg]

8.    translate {called | calling} translation-rule-tag

9.    end

1.    Use the show running-config command to verify the configuration of the MGCP package, for example:

2.    Use the show mgcp command to display the MGCP configuration details, for example:

Router# show running-config
...
mgcp
mgcp call-agent OTHERCLUSTER 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000 action notify
mgcp package-capability rtp-package
no mgcp package-capability res-package
mgcp package-capability sst-package
no mgcp package-capability fxr-package
mgcp package-capability pre-package
no mgcp timer receive-rtcp
mgcp sdp simple
no mgcp validate domain-name
mgcp fax t38 inhibit
mgcp rtp payload-type g726r16 static
!
mgcp profile default
!

Router# show mgcp
MGCP Admin State ACTIVE, Oper State ACTIVE - Cause Code NONE 
MGCP call-agent: 172.18.195.147 2300 Initial protocol service is SGCP 1.5 
MGCP block-newcalls DISABLED 
MGCP send SGCP RSIP:forced/restart/graceful DISABLED, disconnected ENABLED 
MGCP quarantine mode discard/step 
MGCP quarantine of persistent events is ENABLED 
MGCP dtmf-relay for VoIP disabled for all codec types 
MGCP dtmf-relay voaal2 codec all 
MGCP voip modem passthrough mode: NSE, codec: g711ulaw, redundancy: DISABLED, 
MGCP voaal2 modem passthrough mode: NSE, codec: g711ulaw 
MGCP TSE payload: 100 
MGCP T.38 Named Signalling Event (NSE) response timer: 200 
MGCP Network (IP/AAL2) Continuity Test timer: 3000 
MGCP 'RTP stream loss' timer: 2 
MGCP request timeout 500 
MGCP maximum exponential request timeout 4000 
MGCP gateway port: 2427, MGCP maximum waiting delay 3000 
MGCP restart delay 0, MGCP vad DISABLED 
MGCP rtrcac DISABLED 
MGCP system resource check DISABLED 
MGCP xpc-codec: DISABLED, MGCP persistent hookflash: DISABLED 
MGCP persistent offhook: ENABLED, MGCP persistent onhook: DISABLED 
MGCP piggyback msg DISABLED, MGCP endpoint offset DISABLED 
MGCP simple-sdp DISABLED 
MGCP undotted-notation DISABLED 
MGCP codec type g711ulaw, MGCP packetization period 20 
MGCP JB threshold lwm 30, MGCP JB threshold hwm 150 
MGCP LAT threshold lmw 150, MGCP LAT threshold hwm 300 
MGCP PL threshold lwm 1000, MGCP PL threshold hwm 10000 
MGCP CL threshold lwm 1000, MGCP CL threshold hwm 10000 
MGCP playout mode is adaptive 60, 4, 200 in msec 
MGCP IP ToS low delay disabled, MGCP IP ToS high throughput disabled 
MGCP IP ToS high reliability disabled, MGCP IP ToS low cost disabled 
MGCP IP RTP precedence 5, MGCP signaling precedence: 3 
MGCP default package: line-package 
MGCP supported packages: gm-package dtmf-package trunk-package line-package 
                         hs-package atm-package ms-package dt-package res-package 
                         mt-package pre-package

The following example shows MGCP fallback configured on a voice gateway with T1 CAS.

Current configuration : 2181 bytes
!
version 12.2
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Test-3640a
!
logging rate-limit console 10 except errors
!
memory-size iomem 25
voice-card 3
!
ip subnet-zero
!
no ip domain-lookup
ip domain-name test.com
!
no ip dhcp-client network-discovery
frame-relay switching
mgcp
mgcp call-agent 10.0.0.21 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000
mgcp package-capability rtp-package
no mgcp timer receive-rtcp
call rsvp-sync
!
ccm-manager switchback immediate
ccm-manager fallback-mgcp
ccm-manager redundant-host 10.0.0.21
ccm-manager mgcp
!
controller T1 3/0
 framing esf
 linecode b8zs
 ds0-group 1 timeslots 1 type e&m-wink-start
!
controller T1 3/1
 framing sf
 linecode ami
!
interface FastEthernet0/0
 ip address 10.0.0.21 255.255.255.224
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 10.0.0.21 255.255.255.224
 encapsulation frame-relay
 no keepalive
 frame-relay interface-dlci 300
!
interface Serial0/1
 no ip address
 shutdown
 clockrate 2000000
!
interface Ethernet2/0
 ip address 10.0.0.21 255.255.255.224
 half-duplex
!
interface TokenRing2/0
 no ip address
 shutdown
 ring-speed 16
!
ip classless
ip route 10.0.0.21 255.255.255.0 14.0.0.1
ip route 10.0.0.21 255.255.255.0 14.0.0.1
ip route 10.0.0.21 255.255.255.0 14.0.0.1
ip route 10.0.0.21 255.255.255.0 14.0.0.1
ip route 10.0.0.21 255.255.255.255 Ethernet2/0
ip route 10.0.0.21 255.255.255.255 Ethernet2/0
no ip http server
!
snmp-server manager
!
voice-port 1/0/0
!
voice-port 1/0/1
!
voice-port 1/1/0
!
voice-port 1/1/1
!
voice-port 3/0:1
!
dial-peer cor custom
!
dial-peer voice 44 pots
 application mgcpapp
 destination-pattern 4301
 port 1/1/0
!
dial-peer voice 55 pots
 application mgcpapp
 destination-pattern 4302
 port 1/1/1
!
dial-peer voice 85 voip
 destination-pattern 805....
 session target ipv4:10.0.0.21
 codec g711ulaw
!
dial-peer voice 33 pots
 application mgcpapp
 destination-pattern 807....
 port 3/0:1
!
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
 login
end

Note	If the ccm-manager config command is enabled and you separate the MGCP and H.323 dial peers under different tags, make sure that the MGCP dial peers are configured before the H.323 dial peers.

The following example shows MGCP fallback configured on a voice gateway with T1 PRI ports.

version 12.2
no parser cache
no service single-slot-reload-enable
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname voice-3640
!
logging rate-limit console 10 except errors
!
voice-card 1
!
ip subnet-zero
!
no ip domain-lookup
!
no ip dhcp-client network-discovery
mgcp
mgcp call-agent 172.16.240.124 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000 action notify
mgcp modem passthrough voip mode cisco
mgcp package-capability rtp-package
mgcp package-capability sst-package
no mgcp timer receive-rtcp
!
ccm-manager fallback-mgcp
ccm-manager redundant-host CM-B
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server cm-a
ccm-manager config
!
controller T1 1/0
 framing esf
 linecode b8zs
 pri-group timeslots 1-24 service mgcp
!
controller T1 1/1
 framing esf
 linecode b8zs
 pri-group timeslots 1-24 service mgcp
!
interface Serial1/0:23
 no ip address
 no logging event link-status
 isdn switch-type primary-ni
 isdn incoming-voice voice
 isdn T306 30000
 isdn bind-l3 ccm-manager
 no cdp enable
!
voice-port 1/0:23
!
dial-peer voice 9991023 pots
 application mgcpapp
 direct-inward-dial
 port 1/0:23
!
dial-peer voice 9991123 pots
 application mgcpapp
 direct-inward-dial
 port 1/1:23
!
dial-peer voice 1640001 pots
 destination-pattern 16.....
 direct-inward-dial
 port 1/0:23
!
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
 login
!
end

Note	DID is required for T1/E1 PRI dial peers.

The following example shows multicast MOH configured for an MGCP voice gateway:

version 12.2
no parser cache
no service single-slot-reload-enable
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname voice-3640
!
logging rate-limit console 10 except errors
!
memory-size iomem 10
voice-card 1
!
ip subnet-zero
!
ip domain-name test.com
!
no ip dhcp-client network-discovery
mgcp
mgcp call-agent 10.0.0.21 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000
mgcp modem passthrough voip mode cisco
mgcp package-capability rtp-package
mgcp package-capability sst-package
no mgcp timer receive-rtcp
call rsvp-sync
!
ccm-manager redundant-host 10.0.0.21 
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server 10.0.0.21 
ccm-manager config
!
controller T1 2/0
 framing sf
 linecode ami
 ds0-group 0 timeslots 1 type e&m-wink-start
!
controller T1 2/1
 framing sf
 linecode ami
!
interface FastEthernet0/0
 ip address 10.0.0.21 255.255.255.0
 no ip mroute-cache
 duplex auto
 speed auto
 no cdp enable
!
voice-port 1/0/0
!
voice-port 1/0/1
!
voice-port 2/0:0
!
dial-peer cor custom
!
dial-peer voice 125 pots
 application mgcpapp
 port 1/0/0
!
dial-peer voice 150 pots
 application mgcpapp
 port 2/0:0
!
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
 login
!
no scheduler max-task-time
scheduler allocate 4000 4000
!
end

The following configuration includes both MLPP T1 CAS and T1 PRI.

Current configuration :1851 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname 2801_router
!
boot-start-marker
boot-end-marker
!
!
no network-clock-participate wic 1
network-clock-participate wic 2
no network-clock-participate wic 3
no network-clock-participate wic 4
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
no aaa new-model
ip subnet-zero
ip cef
!
!
!
no ftp-server write-enable
isdn switch-type primary-ni
voice-card 0
!
!
!
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server 192.168.12.125
!
!
controller T1 2/0
 framing esf
 clock source internal
 linecode b8zs
 ds0-group 1 timeslots 1-3 type e&m-wink-start
!
controller T1 2/1
 framing esf
 linecode b8zs
 pri-group timeslots 1,24 service mgcp
!
!
!
interface FastEthernet0/0
 ip address 192.168.12.38 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial2/1:23
 no ip address
 isdn switch-type primary-ni
 isdn incoming-voice voice
 isdn bind-l3 ccm-manager
 no cdp enable
!
ip classless
ip http server
!
!
!
control-plane
!
!
voice-port 1/0
!
voice-port 1/1
!
voice-port 2/0:1
!
voice-port 2/1:23
!
mgcp
mgcp call-agent 192.168.12.125 2427 service-type mgcp version 0.1
mgcp rtp unreachable timeout 1000 action notify
mgcp package-capability rtp-package
no mgcp package-capability res-package
mgcp package-capability sst-package
no mgcp package-capability fxr-package
no mgcp timer receive-rtcp
mgcp sdp simple
mgcp fax t38 inhibit
mgcp rtp payload-type g726r16 static
!
mgcp profile default
!
!
!
dial-peer voice 1 pots
 application mgcapp
 port 2/0:1
!
!
line con 0
line aux 0
line vty 0 4
 login
!
end

Current configuration :2530 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname 2621-other
!
boot-start-marker
boot system flash:c2600-ipvoice-mz
boot-end-marker
!
logging buffered 10000000 debugging
enable password lab
!
voice-card 1
!
no aaa new-model
ip subnet-zero
ip tcp synwait-time 13
!
!
ip domain name sample-vlan200.cisco.com
ip host demo 10.69.1.129
ip name-server 10.10.100.100
no ftp-server write-enable
isdn switch-type primary-ni
!
!
voice call carrier capacity active
!
!
ccm-manager fallback-mgcp
ccm-manager mgcp
ccm-manager music-on-hold
ccm-manager config server OTHER
ccm-manager config
!
!
controller T1 1/0
 framing esf
 crc-threshold 320
 clock source internal
 linecode b8zs
 ds0-group 1 timeslots 1-23 type e&m-wink-start
!
controller T1 1/1
 framing esf
 crc-threshold 320
 clock source internal
 linecode b8zs
 ds0-group 1 timeslots 1-23 type e&m-wink-start
!
!
interface FastEthernet0/0
 ip address 10.10.200.23 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
ip classless
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
ip http server
!
control-plane
!
!
call application alternate default
!
!
voice-port 1/0:1
!
voice-port 1/1:1
!
mgcp
mgcp call-agent OTHER 2427 service-type mgcp version 0.1
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000 action notify
mgcp package-capability rtp-package
no mgcp package-capability res-package
mgcp package-capability sst-package
no mgcp package-capability fxr-package
mgcp package-capability pre-package
no mgcp timer receive-rtcp
mgcp sdp simple
no mgcp validate domain-name
mgcp fax t38 inhibit
mgcp rtp payload-type g726r16 static
!
mgcp profile default
!
!
dial-peer cor custom
!
!
dial-peer voice 999101 pots
 application mgcpapp
 port 1/0:1
!
dial-peer voice 999111 pots
 application mgcpapp
 port 1/1:1
!
dial-peer voice 999222 pots
 preference 1
 destination-pattern 100.
 direct-inward-dial
 port 1/0:1
 forward-digits all
!
!
call-manager-fallback
 max-conferences 4
 ip source-address 10.10.200.23 port 2000
 max-ephones 10
 max-dn 10
 dialplan-pattern 1 [A-D].... extension-length 4
 translate calling 1
!
!
line con 0
 exec-timeout 0 0
line aux 0
 exec-timeout 0 0
 no exec
 transport input all
line vty 0 4
 password lab
 login
!
exception core-file core_2621 compress
exception region-size 65536
exception dump 10.10.100.101
!
!
end