Sonifex CM-TB8T - Talkback Control Unit



Talkback Control Unit, CM-TB8 with CM-TBT Dual PSTN Telephone Hybrid
Manufacturer's price :
4 167,60 CHF (tax excl.)

Visuals price :

3 750,84 CHF


Usually ships within 1 to 2 weeks

- +

More info  

The CM-TB8T is the CM-TB8, 8 Channel Talkback Control Unit, with the CM-TBT add-in card fitted.

The CM-TBT is a dual PSTN, telephone hybrid expansion card. It extends the talkback capability of the CM-TB8 by allowing telephone calls to be made and received on two independent analogue direct exchange or PSTN lines.

The hybrids are fully configurable and are easy to setup via the CM-TB8 embedded web server. Simply select your location from a country code list to automatically configure the telephone interface for local line conditions. This setting also configures the relevant auto disconnect mode which can be enabled if required. An option to auto answer an incoming telephone call can also be enabled.

Calls can be made and received by using an external telephone handset connected to each hybrid channel, or directly on the CM-TB8 using the channel controls. Each hybrid can independently speed dial one of the 8 user defined telephone numbers stored on the unit.

IFB modes are fully supported on the telephone channels allowing selected signals to be routed to a connected telephone call.



Technical Specification For CM-TBT

Bandwidth to Telephone Line:

125Hz – 3.6kHz, -3dB ref 1kHz

Telephone Line Impedance:

Nominally 600Ω - complex impedances set via country code

Telephone Line Impedance Range:

300Ω to 1500Ω


2 x RJ11 Socket – line
2 x RJ11 Socket – handset


Add-in card for CM-TB8 with 2 x telephone hybrids.


CM-TB8 including CM-TBT.



Physical Specification


Dimensions (Raw):

15cm (W) x 10cm (D) x 3cm (H)
5.9” (W) x 3.9” (D) x 1.2” (H)

Dimensions (Boxed):

23cm (W) x 13cm (D) x 8cm (H)
9.1 ” (W) x 5.1” (D) x 3.1” (H)


Nett: 0.2kg Gross: 0.3kg
Nett: 0.4lbs Gross: 0.7lbs

    Need help,
    Need financing,
    Call us!

  • GE : + 41 22 561 07 07
  • ZH : + 41 43 255 59 00
  • TI   : + 41 91 985 25 11