What is the Charlesind 3658-80?
The Charlesind 3658-80 is a network/telecom equipment component, listed by the manufacturer as "3658-80 FXO/DPT for T1, 12Ch 2W w/ER, LS/GS, 600/900 ohm DPT w/wink 91-365880-C". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.