The Agent BL10 cable is a QD (Quick‑Disconnect) bottom cable used to connect Agent‑brand headsets to desk phones that require a Plantronics‑style U10 wiring. It is part of the Agent headset accessory lineup, which includes multiple bottom‑cable variants for different phone wiring standards.

The BL10 itself does not appear as a standalone product name in the search results, but it aligns with the Agent “Bottom Half Cable – U10 / U10P‑S / Crosswired” family listed in the Agent Headsets catalogue.

What the BL10 Cable Typically Is

In the Agent ecosystem, BL‑series and U10‑style cables are:

• QD → RJ9/RJ10/RJ11 bottom cables

• Used to connect wired headsets to desk phones

• Wired in Plantronics U10 or U10P‑S configuration

• Required because different phone brands use different pinouts

The BL10 is therefore functionally equivalent to the Agent U10‑type bottom cables.