Cisco WIC-1ADSL-I-DG= Internal interface cards/adapter

1-port ADSL-over-ISDN with dying gasp WAN interface card ADSL WICs are available in three variations: ADSL over POTS (WIC-1ADSL), ADSL over POTS with Dying Gasp support (WIC-1ADSL-DG), and ADSL over ISDN with DyingGasp support (WIC-1ADSL-I-DG). The ADSL over POTS WICs are commonly used to provide ADSL services over ordinary telephone lines. The ADSL over ISDN WIC is used to provide ADSL services in those areas of the world which have extensive ISDN backbones already in place.