# CT3 Module Combination (3 Ports)

> Line module label | CT3
> I/O module label | CT3/T3 I/O
> Number of I/O ports | 3
> Software release | First supported: 1.0.0 Final supported: 7.0.x
> Description | 60 W Channelized T3
> Type | Non-ASIC
> Capability | DS3, DS1, DS0 HDLC framing
> Software features | See ERX Module Guide, Appendix A, Module Protocol Support for information about the layer 2 and layer 3 protocols and applications that this module combination supports.
> Model compatibility | ERX7xx models ERX1410 router
> SRP module compatibility | SRP-5G SRP-5G+ SRP-10G
> Module redundancy support | 1:N redundancy
> Cables and connectors | BNC 75-ohm connector The line interface unit supports two line buildouts: 0–68.5 m (0–225 feet) 69–137 m (226–450 feet) Signal strength is software controlled. The transmitted signal complies with ANSI T1.102-1993 Digital Hierarchy - Electrical Interfaces (1999) for cable lengths up to 201 m (660 feet). See ERX Hardware Guide, Chapter 5, Cabling ERX Routers for more information.
> LEDs | See ERX Module Guide, Appendix B, Module LEDs.
> Alarms, errors, and events | See Monitoring Interfaces in the Configuring Channelized T3 Interfaces chapter of the JunosE Physical Layer Configuration Guide for Release 8.0.x and earlier.