Cisco HWIC-1T interface cards/adapter

Manufacturer part number HWIC-1T=
Vendor Cisco
The 1-port serial HWIC (HWIC-1T) and the 2-port serial HWIC (HWIC-2T) provide an EIA/TIA-232, EIA/TIA-449, V.35, X.21, data terminal equipment/data communications equipment (DTE/DCE) interface, EIA-530 DTE interface, or nonreturn to zero/nonreturn to zero inverted (NRZ/NRZI) serial interface to a Cisco modular router.
Other features
Mac compatibility N
Ports & interfaces
Serial ports quantity 1
Host interface Serial
4-port Channelized T3 to DS0 Shared Port Adapter, Redurbished
1-Port Serial HWIC Front Panel, RF
2-Port Serial WAN Interface Card, RF
2-Port Clear Channel T3/E3 Shared Port Adapter, Refurbished