2B1Q CHANNEL UNIT clei The 2B1Q Channel Unit provides an interface to the 3600/3645 system and 2 wire ISDN subscriber circuits. Line code is North American Standard 2B1Q. Line format is 2B+D, range is 5km. Requires 3600 equipped with Common Carrier Card (

2B1Q CHANNEL UNIT clei The 2B1Q Channel Unit provides an interface to the 3600/3645 system and 2 wire ISDN subscriber circuits. Line code is North American Standard 2B1Q. Line format is 2B+D, range is 5km. Requires 3600 equipped with Common Carrier Card (90-1234-01). Supported by Generic 1116 or greater. This assembly contains a Telcordia CLEI (Common Language Equipment Identifier) label.