Usually the single mode FO patch cord and multimode are distinguished by the boot with different color. Moreover, for single mode or multimode duplex patch cord, it will be sub-distinguished, or not, according to our clients’ requests.

A.No distinguish between fiber 1 and 2 for duplex patch cord

1. Single mode duplex patch cord

LC curved white boots;	SC curved blue boots;
FC solid black boots	ST curved black boots

LC/APC curved green boots;	SC curved green boots;
FC solid green boots	ST curved green boots

Ⅱ. Multimode duplex patch cord

LC curved white boots;	SC curved beige boots;
FC solid black boots	ST curved black boots

B.Distinguish between fiber 1 and 2 for duplex patch cord
Ⅰ. Single mode duplex patch cord
All LC, SC, FC, ST connectors are distinguished by blue and white boots for fiber 1 and fiber 2 (blue boot for the fiber which is labeled)

LC blue white boots	SC blue white boots
FC blue white boots	ST blue white boots

All LC/APC, SC/APC, FC/APC, ST/APC connectors are distinguished by green and white boots for fiber 1 and fiber 2 (green boot for the fiber which is labeled)

LC green white boots	SC green white boots
FC green white boots	ST green white boots

Ⅱ. Multimode duplex patch cord
All LC, SC, FC, ST connectors are distinguished by black and red boots for fiber 1 and fiber 2 (black boot for the fiber which is labeled)

LC black red boots	SC black red boots
FC black red boots	ST black red boots

C. Other ways to distinguish
Ⅰ. By the ring A and ring B

LC single mode boots	LC APC boots
LC multimode boots	SC single mode boots
SC APC boots	SC multimode boots
FC single mode boots	FC APC boots
FC multimode boots	ST single mode boots
ST APC boots	ST multimode boots

　　 Ⅱ. By the ring 1 and ring 2

LC single mode boots	LC APC
LC multimode boots	SC single mode boots
SC APC	SC multimode boots
FC single mode boots	FC APC
FC multimode boots	ST single mode boots
ST APC	ST multimode boots