G3 US ISDN Module - Includes BRI 64\128 KB ISDN Card which supports G.711, G.722, Tieline Music and Mpeg Layer 2. Mono, Dual Mono, Stereo, Joint Stereo - U interface suitable for USA. Please note US ISDN modules are supplied with an ST to U ISDN Converter
Requirements for North America:
Codecs within North America must connect using an NT1B-300TC S/T to U adapter (supplied by Tieline with the Euro ISDN G3 module in North America). Attach power to the S/T to U adapter and a cable between the Euro ISDN G3 module in the codec and the "S/T 1" connection on the adapter. Attach a cable from the "U Line" out connection on the S/T to U adapter to the Telco interface. Switch the termination switch on the S/T to U adapter to 100O. See the Installation Instructions for the NT1B-300TC S/T to U adapter for more detailed information on its use and safe operation.