Additional Details ------------------------------ Product description: The Digital Trunk Interface (DTI) terminals a 24-channel T1 link from a public or private network. It will also support fractional T1. An RJ48 jack provides the interface to the T1 network. Each of the 24 channels can be configured to emulate either loop-start, E&M, or DID trunks. The DTI has an integrated Channel Services Unit (CSU). The CSU provides line isolation, signal regeneration, and network performance monitoring. The CSU can be turned off for use with an external CSU. Must use with clock services cartridge. For use on the Modular ICS only.