Can we use CCS for E1 WAN link?

[fayiz husain]

While Checking the configuration of E1/T1 as WAN, I have seen the command: ''channel-group''. Is it for CAS? Can't we use CCS for this configuration?

Any help would be appreciated.

[Chris Deren]

Yes you use this for CAS circuit types, CCS is different trunk type (Channel Common Signaling) where you have dedicated channel for signaling, i.e. PRI circuit, in which case you use pri-timeslots config under the controller.

HTH,

Chris

[fayiz husain]

So, can we use the ''pri-group timeslot'' command instead of ''channel-group'' command to configure it for ccs? If yes, what's the difference between the configurations of E1/T1 as Wan and as the channel for voice traffic?

[Chris Deren]

If you have a PRI. First you need to figure out what type of trunk you have before you start configuring it.  TDM E1 digital voice circuits can either be PRI or E1-CAS, PRI is much newer technology, however CAS is still common in some parts of the worlds, i.e. Central/South America and other parts of the world.  If you dont know the type of the circuit contact your service provider and have them tell you or look at existing PBX configuration for config details.

I am slightly confused on your WAN question, so are you configuring a voice E1 or data E1?  If data E1, PRI is not an option for you and channel-group is what you need to configure.

HTH,

Chris

[fayiz husain]

Hi Chris,

Thanks for your reply. Can you please explain about the difference between voice E1 and data E1. I thought E1 WAN is the data E1.

[Chris Deren]

Voice E1 would be used to provide PSTN access to your service provider, it is a channaliezed circuit providing 30 concurrent calls, this does not carry any data traffic and is direct connection to service provider for TDM voice calls.

Data E1 is used to provide network connection either directly to your service provider for Internet access or anther remote locations to provide network connection within your organization.

Completely different technologies carrying different purpose traffic.  If you have questions regarding your data connectivity on your network you will be better served posting another question on the WAN forum.

HTH,

Chris