Free 78202T sample questions

Correct answer: The IP Office systems at Site B and Site C have been configured with the same Outgoing Group ID on their respective SCN lines.

In an SCN, each IP Office system must have a unique Outgoing Group ID on its SCN lines. This ID is used to identify the source system for routing and feature transparency. If Site B and Site C have the same ID, the network cannot distinguish between them, leading to routing loops or failures. Since Site A can call both, its ID is unique. The failure between B and C strongly suggests their IDs are duplicated, causing calls between them to fail while calls to the uniquely identified Site A succeed.

Correct answer: Re-purpose the existing IP500 V2 control unit as an Expansion System (V2) and obtain an 'IP Office R11+ Expansion System (V2)' license for the Server Edition.

The designated method for using IP500 V2 hardware with a Server Edition is to convert the IP500 V2 control unit into an Expansion System. This requires a specific 'IP Office R11+ Expansion System (V2)' license to be added to the Server Edition configuration. The Server Edition then controls the re-purposed chassis and all its installed port cards, allowing seamless use of legacy digital and analog endpoints.

Correct answers: The 'ITSP Domain Name' on the SIP Line > SIP URI tab is blank or does not match the domain required by the provider.; Under the Network Topology tab, 'Use Network Topology Info' is set to 'None' instead of pointing to the correct public IP address.

Many SIP providers use the domain name in the SIP headers for authentication and routing. If the 'ITSP Domain Name' is incorrect, the provider's SBC may reject the registration or call setup requests, resulting in a '403 Forbidden' or '401 Unauthorized' error.

When the IP Office is behind a NAT, it will place its private IP address in the SIP headers. Providers often validate the source IP against the registered public IP. Setting 'Use Network Topology Info' correctly ensures the public IP is inserted into the SIP Contact and Via headers, which is essential for the provider to route responses back and authenticate the session, preventing 403/401 errors.

Correct answer: The MPLS provider's routers are not honoring the DiffServ (DSCP) markings on the VoIP packets, leading to contention with data traffic.

High jitter on a link with sufficient bandwidth is a classic symptom of a Quality of Service (QoS) problem. The IP Office marks VoIP packets with DSCP values (typically EF for Expedited Forwarding) to signal that they should be prioritized. If the network devices (like the MPLS routers) are not configured to trust and act on these markings, the real-time voice packets get queued with non-prioritized data traffic, causing variable delays (jitter). A codec mismatch or different software versions would typically cause calls to fail entirely or have consistent issues, not intermittent quality problems. Silence suppression affects bandwidth usage, not directly causing high jitter.

Correct answer: The central office IP Office does not have an IP Route configured for the LAN subnet of the remote branch.

For MWI updates to function correctly with centralized voicemail, the central Voicemail Pro server needs to send control messages back to the IP Office at the remote site. This requires the central IP Office system to have a defined IP Route that directs traffic destined for the remote site's LAN (where the branch IP Office resides) across the SCN. Without this return route, the MWI 'off' signal from the voicemail server never reaches the branch system to extinguish the light. Since users can retrieve messages, the route from the branch to the central site is working correctly; the issue is with the return path.