印度采购需求：GPON OLT、GPON ONU、XGS-PON、ONT、EDFA、光发射机

I'm looking for details on couplers that your factory produces. Specifically, I need information about the various types you offer, including materials, sizes, and any custom options available. Additionally, please provide pricing details, minimum order quantities, and lead times for production and delivery. Understanding your quality standards and any certifications would also be helpful. Looking forward to your prompt response!