08-18-2016 04:31 AM - edited 03-17-2019 07:52 AM
im trying to wrap my head around the css and route pattern partition used with the sip trunk , i noticed that when creating a sip trunk i choose a css under the incoming calls , as the sip trunk connecting two different cucm networks how is the css relevant here? does the css here means that any incoming calls from the sip trunk can call phones partitions under that css ???
also under the route pattern for numbers called through the sip trunk , the "route partition" here means phone that can call that specific partition can call through this sip trunk?? please correct me if im wrong?
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08-18-2016 04:55 AM
Hi,
The CSS under the SIP Trunk is for Incoming Calls, i.e the call which will come to CUCM from External Device to which this SIP Trunk is pointing.
Say If you created SIP trunk to Ip 10.1.1.1 then calls coming form that IP will have This CSS.
usually assigned Internal_pt to allow dialing to all extensions.
Below is a Snapshot
For The Partition on Route Pattern,
It is used for Outbound Calls for Devices Registered To CUCM.
So if The Route Pattern pointing to SIP Trunk is in Partition Say PT_TRUNK
then all devices having access to PT_Trunk and dial using the SIP Trunk.
Please rate if found useful.
Thanks
Haris
08-18-2016 04:55 AM
You've got it more or less correct.
Partitions - who can call you
CSS - who you can call
You can read the --> Calling Privileges in Unified CM <-- section of the SRND for a more detailed explanation with examples.
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10.pdf
08-18-2016 04:55 AM
Hi,
The CSS under the SIP Trunk is for Incoming Calls, i.e the call which will come to CUCM from External Device to which this SIP Trunk is pointing.
Say If you created SIP trunk to Ip 10.1.1.1 then calls coming form that IP will have This CSS.
usually assigned Internal_pt to allow dialing to all extensions.
Below is a Snapshot
For The Partition on Route Pattern,
It is used for Outbound Calls for Devices Registered To CUCM.
So if The Route Pattern pointing to SIP Trunk is in Partition Say PT_TRUNK
then all devices having access to PT_Trunk and dial using the SIP Trunk.
Please rate if found useful.
Thanks
Haris
08-18-2016 05:02 AM
thank you for you explanation but regarding route pattern partition , u meant that only devices that can call PT_Trunk can use this route pattern to call through this sip trunk?
08-18-2016 05:27 AM
Yes that is correct.
Say you want to route Patten 7XXX with Route Partition PT_Trunk Pointing to SIP-Trunk.
If Phone-A has CSS_phone ( with PT_trunk in It) then PHone A can dial 7XXX and call will be routed to SIP Trunk .
Thanks
Please Rate or Mark Correct if found useful.
08-18-2016 05:28 AM
Correct -
If the CSS of the calling device does not contain the partition of the route pattern the call will not complete.
Phone A - CSS = (PT_Trunk) -- -- Route pattern 10000 - Partition = PT_Trunk -- route to SIP trunk <-- this call works
Phone B -- CSS = (PT_Internal) -- -- Route pattern 10000 - Partition = PT_Trunk -- route to SIP trunk <-- this call does not work
08-18-2016 05:29 AM
CSS and partitions work basically the same as they do in a phone.
The partition you define in the RP is the same as if you were setting it on a DN. Who can call you.
The inbound CSS is the same as if you were setting the CSS in a DN or phone. Who you can call.
That's why there's a DNA option for trunks, in the end, they're just relaying what they get, but working within CUCM as if they were just another endpoint to place calls (with a few more options to do digit manipulation).
If you don't have a good understanding of how CSS and partitions work, you really should be reviewing the dial plan chapter from the SRND, the calling privileges section that Les mentioned.
12-13-2017 12:13 AM
08-18-2016 04:55 AM
You've got it more or less correct.
Partitions - who can call you
CSS - who you can call
You can read the --> Calling Privileges in Unified CM <-- section of the SRND for a more detailed explanation with examples.
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10.pdf
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