Configuring Video Support

Step	Command	Purpose
1	router(config)# network-clock base-rate {56k | 64k}	Configure the network-clock base-rate. The default is 56k.
2	router(config)# interface serial number	Enter serial interface configuration mode for either serial port 0 or 1. If the video connection will be over a point-to-point network, specify the point-to-point option. The default option, multipoint, assumes you have a fully meshed network.
3	router(config-if)# encapsulation clear-channel	Configure the serial interface to be in clear-channel mode for pass-through traffic.
4	router(config-if)# clock rate network rate	If the interface is in DCE mode, configure the network clock speed. The maximum rate supported is 2048 MB.
5	router(config-if)# no shutdown	Activate the interface.
6	router(config-if)# dce terminal-timing enable	Enable DCE terminal timing to prevent phase shifting of the data with respect to the clock.
7	router(config-if)# exit	Exit interface configuration mode.
8	router(config)# controller t1 0	Enter controller configuration mode for controller T1 0.
9	router(config-controller)# tdm-group tdm-group-no timeslot timeslot-list	Configure a list of time slots for creating clear channel groups (pass-through) for TDM cross-connect.
10	router(config)# cross-connect id interface-serial controller tdm-group-no	Configure cross-connect pass-through from UIO serial port 0 or 1 to a controller.

This completes the configuration for video traffic in pass-through mode.

Step	Command	Purpose
1	router(config)# network-clock base-rate 64k	Configure the Cisco MC3810 network clock base-rate to 64  kbps if you have not done so already.
2	router(config)# controller {t1  |  e1} 0	Select T1 or E1 controller 0. ATM is supported only on controller 0.
3	router(config-controller)# mode atm	Specify that the controller will support ATM encapsulation, and to create virtual ATM interface 0, which you will use to create the ATM permanent virtual circuits (PVCs).
4	router(config-controller)# exit	Exit controller configuration mode.
5	router(config)# interface atm 0	Enter interface configuration mode to configure ATM interface 0.
6	router(config-if)# pvc [vpi/vci|] vci]	Create an ATM PVC and enter virtual circuit configuration mode.
7	router(config-if-pvc)# encapsulation aal1	Set the PVC to support AAL1 encapsulation for video.
8	router(config-if-pvc)# cbr rate	Enable constant bit rate (CBR) calculation on the PVC. By default, the rate value used is the value configured with the vc-class command. The valid rate is 56-10,000 kbps. The formula to calculate the CBR is 1.14 times the clock rate on the serial port.
9	router(config-if-pvc)# exit	Exit ATM virtual circuit interface configuration mode.
10	router(config-if)# exit	Exit interface configuration mode.
11	router(config)# interface serial number	Enter serial interface configuration mode for either serial port 0 or 1.
12	router(config)# clock rate network rate	If the interface is in DCE mode, configure the network clock speed on the interface to support video traffic. The maximum rate supported is 2048  Mb. The value must be a multiple of 64 kbps.
13	router(config-if)# no shutdown	Activate the interface.
14	router(config-if)# dce terminal-timing enable	Enable DCE terminal timing to prevent phase shifting of the data with respect to the clock.
15	router(config)# encapsulation atm-ces	Configure the ATM encapsulation type to ATM-CES.
16	router(config)# ces connect atm0 pvc [name | [vpi/]vci]	Map the CES service to the PVC. To do this, you must specify the ATM 0 interface, and configure the ATM PVC.

network-clock base-rate 64k
controller T1 0
 mode atm
interface Serial0 point-to-point
 no ip address
 encapsulation atm-ces
 clockrate network-clock 768000
 ces connect 25 atm0 pvc 25/100
interface ATM0 point-to-point
 ip address 223.223.224.229 255.255.255.0
 no ip mroute-cache
 no ip route-cache
 map-group atm1
 pvc 25 25 100 
 encapsulation aal1
 cbr 870
no ip classless
map-list atm1
 ip 223.223.224.228 atm-vc 26 broadcast
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
 login
end