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Configuring Support for PBX Signalling Protocols
Configuring Transparent CCS on the Cisco MC3810
MC-431
Cisco IOS Multiservice Applications Configuration Guide
Note When CCS frame-forwarding is configured, the speed (clock rate) of serial interface 1 on
the Cisco MC3810 is limited to a maximum of 192 kbps. This restriction assumes that the
MFT is installed in slot 3 on the Cisco MC3810. If the MFT is not installed, then serial
interface 1 will not operate at all, but CCS frame-forwarding will be supported on other
interfaces.
Figure 100 shows an example of CCS frame-forwarding. In the example, the Cisco MC3810 captures the
signalling frame from the PBX. The Cisco MC3810 then transports the signalling frame as a data frame
through the Frame Relay or ATM network to the second Cisco MC3810. The second Cisco MC3810 then
forwards the signalling frame to the PBX signalling channel.
Figure 100 CCS Frame-Forwarding
Note Although it is not explicitly stated in the procedures, this feature also requires that voice
ports and dial peers must also be configured.
To configure CCS frame-forwarding on the Cisco MC3810, use the following commands beginning in
global configuration mode:
:
HDLC
signal
frame
DVM T1/E1 T1/E1
DVM
CCS
channel
CCS
channel
Frame Relay
or ATM
Cisco
MC3810
HDLC
signal
frame
Cisco
MC3810
PBXPBX
14755
Command Purpose
Step 1
Router(config)# controller {T1 | E1} 1
Enters controller configuration mode. CCS
frame-forwarding is only available on controller
T1/E1 1.
Step 2
Router(config-controller)# mode ccs frame-forwarding
Specifies the controller to support CCS transparent
signalling.
Step 3
Router(config-controller-cas)# voice-group
channel-no timeslots timeslot-list type
[ext-sig-master | ext-sig-slave]
Configures the specified channel to support CCS
mode, and specifies whether the T1/E1 trunk will be
the external signalling master or slave.
A channel configured as ext-sig-master
automatically generates the off-hook signal and stays
in the off-hook state. A channel configured as
ext-sig-slave automatically generates the answer
signal when a call is terminated to that channel. These
type options are available only when the mode ccs
command is enabled.