I'm not an ESI Tech, Comdial & Transtel are mine, ESI vendor has closed shop.

Line 1 port will not ring from KSU. It rings butt set fine not phones. Swapped lines 1&2 line 1 will ring in the line 2 position but line 2 will not ring in the line 1 position.
Yes I did the 2 min. power down and no change.
Would love to sell this new customer a new phone system however I do need to sleep at night.

Any help for this "new to me" customer