From Webex Calling to CUCM
The Voice Class Tenant 200 is a trunk to process inbound and outbound calls from and to Webex Calling and this will be associated to the Dial Peer Voice 201 with voice-class sip tenant 200 command.
voice class tenant 200
registrar dns:40462196.cisco-bcld.com scheme sips expires 240 refresh-ratio 50 tcp tls
credentials number WxC-Mig-Bootcamp-HQ-Trk9975_LGU username WxC-Mig-Bootcamp-HQ-Trk3638_LGU
password 0 kAG^V5^ZaZ realm BroadWorks
authentication username WxC-Mig-Bootcamp-HQ-Trk3638_LGU password 0 kAG^V5^ZaZ realm BroadWorks
authentication username WxC-Mig-Bootcamp-HQ-Trk3638_LGU password 0 kAG^V5^ZaZ realm
40462196.cisco-bcld.com
no remote-party-id
sip-server dns:40462196.cisco-bcld.com
connection-reuse
srtp-crypto 200
session transport tcp tls
url sips
error-passthru
asserted-id pai
bind control source-interface GigabitEthernet1
bind media source-interface GigabitEthernet1
no pass-thru content custom-sdp
sip-profiles 200
outbound-proxy dns:da09.sipconnect-us.bcld.webex.com
privacy-policy passthru
We need to define the pattern to uniquely identify the specific organization to be matched by the incoming dial peer in the Local Gateway from Webex Calling.
Incoming calls from Webex Calling are identified with voice class URI. The SIP INVITE Request-URI sent from the Webex Calling cloud to the local gateway contains a dtg parameter that is generated in Control Hub.
voice class uri WBX-URI sip
pattern dtg=wxc-mig-bootcamp-hq-trk3638.lgu
The Dial Peer Group 300 points to Dial Peer Voice 301 to route incoming calls from Webex Calling to dial peer 301.
voice class dpg 300
description Incoming calls webex (Dial Peer 201) to CUCM (Dial Peer 301)
dial-peer 301 preference 1
The call from Webex Calling uses the dial peer 201 because there is a match using the incoming uri request WBX-URI command.
dial-peer voice 201 voip
description Inbound/Outbound Webex Calling
max-conn 250
destination-pattern BAD.BAD
session protocol sipv2
session target sip-server
destination dpg 300
incoming uri request WxCMigBootcamp
voice-class codec 99
voice-class stun-usage 200
no voice-class sip localhost
voice-class sip tenant 200
dtmf-relay rtp-nte
srtp
no vad
The voice class tenant 100 is a trunk to the CUCM. It will be applied on all Outbound dial peers facing the CUCM.
voice class tenant 100
session transport udp
url sip
error-passthru
bind control source-interface GigabitEthernet2
bind media source-interface GigabitEthernet2
no pass-thru content custom-sdp
Define the CUCM as the target for the dial peer 301. In order to do that, you need to create voice class server group with all the IP addresses of the CUCM nodes with the callmanager service enabled.
voice class server-group 301
ipv4 10.1.5.15
Because the Dial Peer Group 300 configured previously points to Dial Peer Voice 301 with dial-peer 301 preference 1 command the call is routed to dial peer 301. This Dial Peer points to IP of CUCM using the voice class server-group command.
dial-peer voice 301 voip
description Outgoing dial-peer to CUCM
destination-pattern BAD.BAD
session protocol sipv2
session server-group 301
voice-class codec 99
dtmf-relay rtp-nte
voice-class sip tenant 100
no vad
From CUCM to Webex Calling
Configure the Voice Class Tenant 300 that will be applied on all Inbound dial peers from the CUCM.
This will be associated to Dial Peer Voice 300 using the voice-class sip tenant 300 command.
voice class tenant 300
bind control source-interface GigabitEthernet2
bind media source-interface GigabitEthernet2
no pass-thru content custom-sdp
Configure the voice class URI to match the CUCM IP address.
voice class uri 300 sip
host ipv4:10.1.5.15
Define the dial peer group 200, the purpose is to route the calls to dial peer 201.
voice class dpg 200
description Incoming CUCM (Dial Peer 300) to Webex Calling (Dial Peer 201)
dial-peer 201 preference 1
The dial peer 300 matches the CUCM IP address based on the voice class URI using the incoming uri via 300 command, then the call is routed to the dial peer group 200 because the destination dpg 200 command.
dial-peer voice 300 voip
description Incoming dial-peer from Unified CM to Webex
session protocol sipv2
destination dpg 200
incoming uri via 300
voice-class codec 99
dtmf-relay rtp-nte
voice-class sip tenant 300
Because the Dial Peer Group 200 points to Dial Peer Voice 201 the call is routed to dial peer 201, The call is sent to Voice Class Tenant 200 since the Dial Peer 201 is configured with voice-class sip tenant 200 command
dial-peer voice 201 voip
description Inbound/Outbound Webex Calling
max-conn 250
destination-pattern BAD.BAD
session protocol sipv2
session target sip-server
destination dpg 300
incoming uri request WxCMigBootcamp
voice-class codec 99
voice-class stun-usage 200
no voice-class sip localhost
voice-class sip tenant 200
dtmf-relay rtp-nte
srtp
no vad
