ATA 191 Multiplatform Analog Telephone Adapter
Cisco ATA 192 Multiplatform Analog Telephone Adapter

- Cisco ATA 191 Analog Telephone Adapter Open Source License for Firmware Release 12.0(2) (PDF - 1 MB)
- Cisco ATA 191 Analog Telephone Adapter Open Source License for Firmware Release 12.0(1) (PDF - 1 MB)