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 (v1.1 Silicon Labs Si2168-B40)
  • Tuner: Silicon Labs Si2158-A20 (v1.1 Silicon Labs Si2157-A30)
  • 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. Version 1.1 not yet in any mainline kernel, but support can be added to an older kernel using media_build.



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


Bus 002 Device 004: ID 0b48:3015 TechnoTrend AG


[    5.464401] usb 1-3: dvb_usb_v2: found a 'TechnoTrend TT-connect CT2-4650 CI v1.1' in warm state
[    5.465410] usb 1-3: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer
[    5.465477] DVB: registering new adapter (TechnoTrend TT-connect CT2-4650 CI v1.1)
[    5.466996] usb 1-3: dvb_usb_v2: MAC address: xx:xx:xx:xx:xx:xx
[    5.524675] i2c i2c-1: Added multiplexed i2c bus 2
[    5.524693] si2168 1-0064: Silicon Labs Si2168 successfully attached
[    5.548220] si2157 2-0060: Silicon Labs Si2147/2148/2157/2158 successfully attached
[    5.640181] sp2 1-0040: CIMaX SP2 successfully attached
[    5.640272] usb 1-3: DVB: registering adapter 0 frontend 0 (Silicon Labs Si2168)...
[    5.700106] Registered IR keymap rc-tt-1500
[    5.706671] input: TechnoTrend TT-connect CT2-4650 CI v1.1 as /devices/pci0000:00/0000:00:04.1/usb1/1-3/rc/rc0/input5
[    5.707172] rc rc0: TechnoTrend TT-connect CT2-4650 CI v1.1 as /devices/pci0000:00/0000:00:04.1/usb1/1-3/rc/rc0
[    5.707191] usb 1-3: dvb_usb_v2: schedule remote query interval to 300 msecs
[    5.707204] usb 1-3: dvb_usb_v2: 'TechnoTrend TT-connect CT2-4650 CI v1.1' successfully initialized and connected
[    5.707457] usbcore: registered new interface driver dvb_usb_dvbsky
[   11.814813] dvb_ca adapter 0: DVB CAM detected and initialised successfully
[   12.258861] si2168 1-0064: found a 'Silicon Labs Si2168-B40'
[   12.265791] si2168 1-0064: downloading firmware from file 'dvb-demod-si2168-b40-01.fw'
[   14.010239] si2168 1-0064: firmware version: 4.0.19
[   14.021942] si2157 2-0060: found a 'Silicon Labs Si2157-A30'
[   14.048673] si2157 2-0060: firmware version: 3.0.5


The easiest option is to download the necessary firmware files from OpenELEC DVB 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


  • dvb-demod-si2168-b40-01.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

Also, just running "gnutv -cammenu" seems to initialize my CAM.

External Links