Check the listing for details. ESI E2-DLC12 5000-0348 T1/PRI by 12 Digital Station Circuit Card. Condition: Seller refurbished. Listed at 184.95 USD. Description E2 DLC 12 PC - Provides either a T1 interface supporting 24 DS0 channels or an ISDN PRI interface supporting 23 B (bearer) channels, one D (datalink) channel and 12 digital stations. CompatibilityESI IVX E-Class Gen IIESI IVX X-ClassESI IVX C-ClassESI Communications Server 200 (Requires Hot-Swap Port Card Adapter)ESI Communications Server 600 (Requires Hot-Swap Port Card Adapter)ESI Communications Server 1000 (Requires Hot-Swap Port Card Adapter)The parts sold by YourOfficePhone all require the correct phone system to operate, not just phone service. You cannot plug a phone into your house or home office without the exact phone system necessary to make the phone work. Not sure exactly what you need? Contact us and our friendly team will help you find the exact items you need. Warranty Our 90 day warranty covers normal use or if something is not working out of the box. We do not offer exchanges or returns for improper installation, improper usage, spilling fluids, dropping or throwing any part of the phone, or acts of God. Acts of God include lightning, fire, flood, power outages (surges), hurricanes, tornadoes, earthquakes, or any other natural occurrence. Returns We accept returns for any reason up to 30 days. About YourOfficePhone While the telecommunications industry is changing dramatically we are going to continue to stock the older, reliable telephones & spare parts for the foreseeable future. You may hear that the parts are no longer available but be assured they are. We have been in business since 2006 and stock thousands of telecom related parts. Contact Us Please use eBay messaging to contact us.