Can a hotel use a 2-line phone with the Cisco 575 LRE CPE, assuming the two lines are connected to the single phone port of the CPE?
A. Yes. Cisco can support 2-line phones with the Cisco 575 LRE CPE. The 575 LRE CPE uses pins 3 and 4 (pair 1) for the LRE signal and we map pins 2 and 5 (pair 2) and 1 and 6 (pair 3) directly to the same pins on the phone port on the CPE. When the wiring is done for both lines, make sure that the pair you ran through the splitter in the main distribution frame carries the LRE signal (pins 3 and 4) and then use one of the other pairs (as required by the phone) to support the second line. This line does not need to pass through the splitter since it doesn’t carry LRE signals. Note: Pairs are counted from the inner pair out. This means that pair 1 pins (3 and 4) carry the LRE information. Pair 2 pins (2 and 5) and pair 3 pins (1 and 6) pass through.
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