Back ElectronicsYEASTARAmazonYEASTAR - S-Series Expansion Module T1/E1R 9 223.20Amazon ยท checked 19 days ago View at Amazon AverageR 10 383.60Lowest seenR 9 223.20Highest seenR 10 383.60Last change-R 1 160.40First indexed13 Sep 2026RetailerAmazonPrice historyDescriptionMyPBX_EX30 YEASTAR - S-Series Expansion Module T1/E1 INPUT_OUTPUT_CARD