210-065 · Question #299
When a user attempts to sign with a Jabber Video for Cisco Telepresence, which SIP message is the first that is sent?
The correct answer is C. SUBSCRIBE. When Jabber Video for Cisco TelePresence signs in, it first sends a SUBSCRIBE message to retrieve provisioning and configuration information from the infrastructure.
Question
When a user attempts to sign with a Jabber Video for Cisco Telepresence, which SIP message is the first that is sent?
Options
- AREGISTER
- BNOTIFY
- CSUBSCRIBE
- DINFO
How the community answered
(48 responses)- A2% (1)
- B10% (5)
- C83% (40)
- D4% (2)
Why each option
When Jabber Video for Cisco TelePresence signs in, it first sends a SUBSCRIBE message to retrieve provisioning and configuration information from the infrastructure.
REGISTER is sent later in the sign-in flow, after the client has received its provisioning data via the SUBSCRIBE/NOTIFY exchange.
NOTIFY is a server-to-client message sent in response to a SUBSCRIBE; the client does not send NOTIFY to initiate sign-in.
Jabber Video (formerly Cisco Movi) initiates sign-in by sending a SIP SUBSCRIBE request to the provisioning service on the VCS or CUCM infrastructure. This allows the client to receive its configuration profile and directory settings before proceeding with device registration, making SUBSCRIBE the first SIP message in the sign-in sequence.
INFO is used mid-dialog to convey application-level information (such as DTMF) and is not part of the initial sign-in sequence.
Concept tested: SIP sign-in sequence for Jabber Video provisioning
Source: https://www.cisco.com/c/en/us/support/docs/unified-communications/jabber-video-cisco-telepresence/116393-configure-jvct-00.html
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