TechnoTrend TT-connect CT2-4650 CI

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A combined DVB-C, DVB-T and DVB-T2 USB 2.0 device from TechnoTrend. The device has a CI slot which is supported by the driver.


Components Used

  • USB interface: Cypress CY7C68013A-56LTXC
  • Demodulator: Silicon Labs Si2168-A20
  • Tuner: Silicon Labs Si2158-A20
  • CI chip: CIMaX SP2HF

Driver support

The driver is in media_tree and can be built into older kernels using media_build. Included in kernel 3.18.


Bus 002 Device 004: ID 0b48:3012 TechnoTrend TT-connect CT2-4650 CI


[136379.859951] dvb-usb: found a 'TechnoTrend TT-connect CT2-4650 CI' in warm state.
[136379.859979] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[136379.860109] DVB: registering new adapter (TechnoTrend TT-connect CT2-4650 CI)
[136380.066503] i2c i2c-0: Added multiplexed i2c bus 1
[136380.066505] si2168 0-0064: si2168: Silicon Labs Si2168 successfully attached
[136380.069052] si2157 1-0060: si2157: Silicon Labs Si2157/Si2158 successfully attached
[136380.283682] sp2 0-0040: CIMaX SP2 successfully attached
[136380.283688] usb 1-1.3.3: DVB: registering adapter 0 frontend 0 (Silicon Labs Si2168)...
[136380.284024] Registered IR keymap rc-tt-1500
[136380.284126] input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3.3/rc/rc0/input27
[136380.284160] rc0: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3.3/rc/rc0
[136380.284162] dvb-usb: schedule remote query interval to 150 msecs.
[136380.284163] dvb-usb: TechnoTrend TT-connect CT2-4650 CI successfully initialized and connected.
[136380.284177] usbcore: registered new interface driver dvb_usb_cxusb
[136386.529709] dvb_ca adapter 0: DVB CAM detected and initialised successfully


The firmware for the tuner is the same as for TechnoTrend TT-TVStick CT2-4400#Firmware

The demodulator needs a firmware that can be extracted from the Windows drivers. File ttConnect4650_64.sys should be extracted from the driver package (MD5 sum below).

3464bfc37a47b4032568718bacba23fb  ttConnect4650_64.sys

Then the firmware can be extracted:

dd if=ttConnect4650_64.sys ibs=1 skip=273376 count=6424 of=dvb-demod-si2168-a20-01.fw

The easiest option is to download them from OpenELEC firmware collection [1]. Note that when downloading the firmware, you will need to click the Raw button to get the actual binary.

  • dvb-demod-si2168-a20-01.fw
  • dvb-tuner-si2158-a20-01.fw

Place the firmware files under /lib/firmware.

IR Remote Control

The supplied remote control is supported by the driver.

Known issues

Some CAMs require initialization before they will work. Without initialization it's possible that even non-encrypted channels do not work. If there's no CAM inserted, there's no issue.

gnutv could be used to initialize the CAM, for example:

gnutv -timeout 1 -out file /var/tmp/test.ts -channels ~/channels.conf FOX

External Links