Refer to the exhibit.
A user is going through a series of dialing steps on a SIP Type B IP phone (for example, a Cisco
7975) to call an SCCP IP phone. Both phones are registered to the same Cisco Unified
Communications Manager cluster. Assuming the calling SIP phone is associated with a SIP Dial
Rule with a pattern value of 2001, which statement about the call setup process of this call is true?
A.
Each digit will arrive at Cisco Unified Communications Manager in a SIP NOTIFY message as a
KPML event, and Cisco Unified Communications Manager will extend the call as soon as the
collected digits match the extension of the SCCP IP phone, bypassing class of service
configuration on both IP phones.
B.
Each digit will arrive at Cisco Unified Communications Manager in a SIP NOTIFY message as a
KPML event. When the collected digits match the extension of the SCCP IP phone, Cisco Unified
Communications Manager will extend the call only if the class of service configuration on both
phones permits this action.
C.
As soon as the user selects the Dial softkey, the SIP IP phone will forward all digits to Cisco
Unified Communications Manager in a SIP INVITE message. Cisco Unified Communications
Manager will extend the call as soon as the collected digits match the extension of the SCCP IP
phone, bypassing class of service configuration on both IP phones.
D.
As soon as the user selects the Dial softkey, the SIP IP phone will forward all digits to Cisco
Unified Communications Manager in a SIP INVITE message. Cisco Unified Communications
Manager will extend the call only if class of service configuration on both phones permits this
action.
E.
The SIP IP phone will wait for the interdigit timer to expire, and then send all digits to Cisco
Unified Communications Manager in a SIP INVITE message. Cisco Unified Communications
Manager will extend the call as soon as the collected digits match the extension of the SCCP IP
phone, bypassing class of service configuration on both IP phones.
Explanation:
Cisco Type B SIP Phones offer functionality based SIP INVITE Message. Every key
the end user presses triggers an individual SIP message. The first event is communicated with a
SIP INVITE, but subsequent messages use SIP NOTIFY messages. The SIP NOTIFYmessages
send KPML events corresponding to any buttons or soft keys pressed by the user. Cisco Type B
SIP IP Phones with SIP dial rules operate in the same manner as Cisco Type A phones with dial
rules.