Refer to the exhibit.
During a QSIG tunneling over SIP call establishment, which two types of SIP messages can the OGW
use to tunnel a waiting QSIG message? (Choose two.)
A.
SIP re-INVITE
B.
SIP NOTIFY
C.
SIP INFO
D.
SIP OPTIONS
E.
SIP UPDATE
F.
SIP REFER
Explanation:
The TGW sends and the OGW receives a 200 OK response–the OGW sends an ACK message to the
TGW and all successive messages during the session are encapsulated into the body of SIP INFO
request messages. There are two exceptions:
When a SIP connection requires an extended handshake process, renegotiation, or an update, the
gateway may encapsulate a waiting QSIG message into a SIP re-INVITE or SIP UPDATE message
during QSIG call establishment.
When the session is terminated, gateways send a SIP BYE message. If the session is terminated by
notice of a QSIG RELEASE COMPLETE message, that message can be encapsulated into the SIP BYE
message.
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“http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/sip/configuration/15-mt/sip-config-15-
mt-book/voi-sip-tdm.html”-sip-tdm.html