Refer to the exhibit. An administrator is migrating a PBX telephony system to an IP Phone solution using afixed numbering plan. The extension numbers and PSTN DIDs cannot be changed. Which of the followingmethods can be used in order to reach the individual extensions at Site B when called via the PSTN?
A. The administrator can add a 1 to the DID for Site B to become 300-555-31xxx.
B. The administrator needs to map the last four digits in the DID to the extension numbers and prefix a sitecode.
C. The administrator needs to map the last four digits in the DID to the extension numbers and prefix anintersite code.
D. The administrator needs to map the last four digits in the DID to the extension numbers using translation rules.
E. No changes are necessary because PSTN calls are preceded with access code 9.
