Definity TN755B Neon

The TN755B neon power unit circuit pack is used with all Definity servers except the Definity CSI and the G600 Media Gateway. The CSI and G600 have neon built into their 650 power supplies. The TN755B circuit pack produces 150 VDC to operate neon message waiting lights on terminals that are connected to TN746B analog line circuit packs. A TN755B circuit pack is required for each carrier where neon message waiting indicators are connected. This circuit pack and the neon message waiting function are not available on systems that use the TN2202 ring generator circuit pack for France balanced-ringing.

• Produces 150 VDC to operate neon message waiting lights on terminals connected to TN746B analog line circuit packs
• Required for each carrier where neon message waiting indicators are connected