I just got this info from Motorola site if it will tell anything.
Hide all DCT6412
Convenience Features
TWO HDTV TUNERS for increased watch and record options
Larger hard drive than single tuner version allowing for more storage
HDTV and DVR functionality in one unit
Full feature access from front panel
Digital diagnostics
Front and rear panel L/R audio and video inputs
Two USB connectors (one on front panel)1>
1 Future feature
Versatility Features
Pause, rewind and replay live HD broadcasts
Robust CPU, memory footprint, 3D graphics to run IPG, VOD, advanced applications and middleware
Full range of interfaces including YpbPr, DVI, 1394, USB, Ethernet, SPDIF, Smartcard1>, and more
YpbPr component output
Integrated High Definition decoder with YpbPr component output
DVI and dual 1394 (DTV) digital connectors
Built-in dual MPEG analog encoder
Optical and electrical SPDIF / Dolby Digital connectors
S-Video Output
Baseband output (Video, L/R Audio) ports
4 digit, 7 segment LED display with IR receiver for remote or/and keyboard
Switched Accessory Outlet
DVI and 1394 (DTV) digital interfaces
1 Future feature
Performance Features
Supports HDTV, Dolby 5.11> and DVR services
DOCSIS 1.0 / 1.1 capable integrated cable modem for high speed interactivity*
Internal 120 GB hard drive
MPEG-2 digital video processor
PCM, AC-3, Dolby 5.1 Prologic Digital audio capability
ITU standard 64/256 QAM/FEC/enhanced adaptive equalizer
Three 54-860 MHz tuners (two video, one data)
Frequency agile 2.048 Mbps out-of-band data receiver
32 bit, 2-D / 3-D graphics
Analog/digital video scaling (Picture in Graphics)
16 MB Flash, 128 MB DRAM standard unified memory
Clear analog channel processor with BTSC decoder
DES-based encryption/DCII access control
Macrovision® copy protection
10/100 Base-T Ethernet Port (RJ45 Connector)
Smartcard interface connector (e-commerce)2
TVPASS renewable security connector
IR Blaster Port
1 Speakers and subwoofers are not included with the DCT6208 and are required for use with a Dolby system.
2 Future feature
Data Sheets and White Papers
Download Data Sheet (PDF, 62 KB)
Download User Guide (PDF, 1.5 MB)
Download TV Guide DVR Manual (PDF, 2.2 MB)
Download Microsoft Foundation Quick Reference (English) (PDF, 1.6 MB)
Download Microsoft Foundation Quick Reference (Spanish) (PDF, 1.6 MB)
Download Pioneer Echo - Getting Started (PDF, 468 KB)
I also found this
How do I transfer digital recordings to my PC?
The IEEE1394 (firewire) port can be used for transferring digital video to a PC for archiving, but it is limited by the copy protection coding that programming providers embedded in the data with the digital video. The digital video is not accessible for transfer through the built in software yet. Software companies who provide the interactive program guides and DVR Menu systems have not yet supplied the functionality to transfer your digital recordings, but some people on their own have devised a way to access digital recordings on the DCT6208 or DCT6412 and offload them to a PC hard drive or Digital High Def VCR.
When transferring digital video by the method referred to above, copy protection restriction will apply. The recordings will play from the other device only if the programming provider has not encoded the digital content with a "copy never" command. Some programming sources encode them with a "copy once" command which allows you to transfer it once but if you try to transfer it again the content becomes unplayable. Of course, since the method for transferring digital video described above is in the public domain and not authored or controlled by Motorola or the software providers described above, Motorola makes no warranty that it that the method will work. Motorola will also not be liable for any loss or damage resulting from your use of such methods.
Here's how to transfer non-copy protected recordings via IEEE1394/Firewire:
http://www.avsforum.com/avs-vb/showthread.php?postid=3818890#post3818890