The settings described here are meant only as examples of how CUCM can be configured to work with a VIS. Other settings and/or usages of alternate CUCM functionality could also be used to achieve the same result. No recommendation is implied as to the optimal configuration for a particular scenario call manager.
A number of CUCM settings need to be confirmed or changed for interoperation with the VIS. Follow the procedures below in order to avoid missing required settings.
Configure the CUCM
Log in to CUCM and navigate to Cisco Unified CM Administration->Call Routing->Class of Control->Partition.
In the Partition Configuration screen, enter the partition name and description and click on Add New.
Navigate to Cisco Unified CM Administration->Call Routing->Class of Control->Calling Search Space.
In the Calling Search Space Configuration screen, enter the name for the calling search space, and in Selected Partitions, enter the name of the partition you just created. Click Save when done.
Navigate to Cisco Unified CM Administration->System->Security->SIP Trunk Security Profile.
In the SIP Trunk Security Profile Configuration screen, set the SIP Trunk Security Profile Information options as shown, and click on Add New.
TABLE 1
Parameter Recommended setting
Name
SfBVideoInterop_SecurityProfile
Device Security Mode
Non Secure
Incoming Transport Type
TCP + UDP
Outgoing Transport Type
TCP
Incoming Port
5060
Navigate to Cisco Unified CM Administration->Device->Device Settings->SIP Profile.
In the SIP Profile Configuration screen, set the SIP Profile Information options as shown.
TABLE 2
Parameter Recommended setting
Name
SfBVideoInterop_SIPProfile
Description
SfBVideoInterop_SIPProfile
On the same screen, scroll down to the SDP Profile Information section. The SDP Session-level Bandwidth Modifier for Early Offer and Re-invites option is set by default to TIAS and AS. Change this option to TIAS only. If you leave this option at its default setting, Skype for Business Server will not understand the bandwidth modifier information in the SIP message. TIAS means Transport Independent Application Specific while AS means Application Specific. These are SIP options specified in RFC3890.
On the same screen, scroll down further. Under the SIP Profile's Trunk Specific Configuration, select Early Offer Support for voice and video calls and set it to the Mandatory (insert MTP if needed) option. This will enable CUCM to set up an outgoing SIP call with Early Offer. One new feature in CUCM 8.5 and beyond is that it supports outgoing call setup with Early Offer without requiring Media Termination Point (MTP).
Verify that in the SIP Options ping section, the box is checked next to "Enable OPTIONS Ping to monitor destination status for Trunks with Service Type 'None (Default)'."
When you are finished, click on Add New.
Navigate to Cisco Unified CM Administration->Device->Trunk.
Set the Device Protocol to SIP and press Next.
Under Device Information, Set the Device Name and Description (probably to something like SfBVideoInterop_SIPTrunk), and set the Media Resource Group List to an MRGL that contains the right media resources.
Scroll down further. Media Termination Point (MTP) is not required for Video Calls, if it is not already unchecked, uncheck it. Check the option to Run on all active Unified CM Nodes. Please note that you should add all CUCM nodes to the Skype for Business Server configuration.
Scroll down further. Set the Inbound Calls and Connected Party Settings options as shown.
TABLE 3
Parameter Recommended setting
Calling Search Space
CSS_SfBVideoInterop
AAR Calling Search Space
CSS_SfBVideoInterop
Connected Party Transformation CSS
CSS_SfBVideoInterop
Scroll down further. Under the SIP Information Destination section of the SIP Trunk configuration, specify the VIS Pool's FQDN or the IP address of individual VIS servers in the pool (adding multiple entries). In the Destination Port specify the Port that VIS is listening at for connections from CUCM (the default is 6001). Also specify the SIP Trunk security profile and SIP profile you created earlier, as shown.
TABLE 4
Parameter Recommended setting
SIP Trunk Security Profile
SfBVideoInterop_SecurityProfile
Rerouting Calling Search Space
CSS_SfBVideoInterop
Out-of-Dialog Refer Calling Search Space
CSS_SfBVideoInterop
Subscribe Calling Search Space
CSS_SfBVideoInterop
SIP Profile
SfBVideoInterop_SIPProfile
DTMF Signaling Method
RFC 2833
Scroll down further. Set the Recording Information as appropriate for your system. It's fine to leave it set to None.
When you are finished, click on Add New.
Navigate to Cisco Unified CM Administration->Call Routing->Route/Hunt->Route pattern.
In the Route Pattern Configuration screen, enter the Pattern definition parameters shown below. Scroll down to the Called Party Transformations section and set the mask as shown, and then click on Add New when finished.
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