Which statement about the offer/answer model of SDP is correct?
A. Offer/answer cannot be considered complete when it happens in an INVITE/18x exchange.
B. PRACK message must not carry SDP, or else offer/answer will not work.
C. Offer must be included in the initial INVITE; otherwise, offer/answer cannot complete.
D. It is best to start a call without an offer and wait for an answer.
E. ACK message can carry the SDP answer.
Which two mechanisms can be used to detect SIP calls that are hung or stuck in an incomplete state? (Choose two.)
A. SDP time stamps and version number
B. PRACK (RSeq)
C. session timer
D. periodic hold/resume
E. OOD Refer
F. RTP and RTCP inactivity monitoring
Which statement correctly describes symmetric signaling in SIP?
A. SIP devices use the same listening port for all incoming SIP messages.
B. SIP devices send and receive SIP messages at the same time.
C. SIP devices send SIP traffic to the same IP address and port number of an upstream element.
D. SIP devices use the same source port for SIP messages.
E. SIP devices use the same port number for sending and receiving SIP messages.
Refer to the exhibit. The line that is shown in the exhibit appeared in the Cisco Unified Communications Manager trace for a SIP IP phone that deregisters frequently. What could be the reason for deregistration?
A. The phone was reset from the Cisco Unified Communications Manager Administration web page.
B. The phone lost power momentarily and rebooted itself.
C. Cisco Unified Communications Manager reset the TCP connection to the phone.
D. The phone was restarted from the Cisco Unified Communications Manager Administration web page.
E. The phone aborted the TCP connection.
Which statement about the “Unknown Caller ID” service parameter in Cisco Unified Communications Manager configuration is true?
A. This parameter defines a numeric string to be displayed to the called party on inbound calls that arrived with no caller ID information.
B. This parameter designates a numeric string to be displayed to the called party for outbound calls without caller ID information.
C. This parameter defines a numeric or a text string to be displayed to the called party for inbound calls that arrived with no caller ID information.
D. This parameter designates a numeric or a text string to be displayed to the called party for outbound calls without caller ID information.
E. This parameter defines a numeric string to be displayed to the called party on inbound and outbound calls with no caller ID information.
Which two media resources are not required by Cisco Unified Communications Manager for outbound early-offer support on SIP trunks? (Choose two.)
B. software-based MTP in Cisco IOS gateways
C. hardware-based MTPs in Cisco IOS gateways
D. software-based MTPs using the Cisco IP Voice Media Streaming Application on Cisco MCS
E. Cisco Unified Border Element with H.323-to-SIP interworking enabled
There are several methods to transport DTMF digits between SIP endpoints. Which three methods are supported by Cisco Unified Communications Manager? (Choose three.)
A. Unsolicited Notify
D. RFC 2833 in-band signal tone/event
E. Cisco RTP-NTE
F. H.245 alphanumeric
According to the Cisco QoS SRND guide, cRTP is recommended on which link speed?
A. lower than or equal to 10 Mb/s
B. lower than or equal to 384 kb/s
C. lower than or equal to 1.544 Mb/s
D. lower than or equal to 768 kb/s
E. lower than or equal to 512 kb/s
Which Cisco IOS CLI command can be used to identify the high jitter level of an RTP stream on a
Cisco IOS voice gateway?
A. show call active voice brief
B. show voip rtp connections
C. show voice dsp detailed
D. show voice call summary
E. show policy-map interface
According to RFC 3551, where default mappings between RTP payload type numbers and encodings are defined, which RTP payload type corresponds to G.711 a-law encoding?
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