#31. Exhibit: In the shown diagram the user at Phone A is hearing persistent echo on calls to the PSTN. The ERL has been determined to be 15db. Note the following configuration on the HQ-GW voice T1: voice-port 1/0:15 echo-cancel coverage 8 end What step should the user initiate to attempt to resolve the echo?
#35. Exhibit: Consider the QoS configuration in the picture shown for VoIP call across an MPLS network. If IP Phone A calls IP Phone B, how will voice and signaling packets be marked by the time they arrive at the IP Phone B? Note: Assume the LAN switches (and any other equipment in the cloud) do not mark or remark the packets, and the complete MPLS router QoS configuration is shown in the picture.
#37. Based upon Cisco’s design guide, using a G.729 codec, and no header compression, what is the typical bandwidth needed for a single VoIP call (including layer 2)?
#39. Exhibit: A user at Phone A finished a call. Later, he notes that “CM Fallback Service Operating” is displayed on Phone A. Which are possible explanations for this?
#40. Consider: Phone A’s device calling search space is CSS_Dev_A. Phone A’s Line 1 is assigned calling search space CSS_Line_A Route Pattern 2XXX is placed in Partition Part_1. Route Pattern 20XX is placed in Partition Part_2. Route Pattern 200X is placed in Partition Part_3. CSS_Dev_A contains partition(s) Part_1. CSS_Line_A contains partition(s) Part_2. If a call is made to 2001 from Phone A, using Line1, what route pattern will be chosen by Call Manager?
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