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Overview:

The telephone input/output module OP-33 allows adapting of an external telephone hybrid, digital or analogue, to the rest of the modules in the system. It has one audio input that is fed by an external telephone hybrid at line level. This input can be monitored on the PFL bus if the PFL IN push button is pressed and the status LED is lit.

• Mono input and output for external telephone hybrid,4-wire line or codec
• Remote control for hybrid or codec with ring indicator and off-hook button
• External line send level adjust
• PFL button for incoming and outgoing signals
• Stereo Auxiliary buss send adjust
• Master buss send switch
• CHANNEL ON (channel mute) button
• 100 mm. fader. VCA control
• XLR3 female input connectors. XLR3 male output connectors. DB9 connector for remote control

Panel Features:

• The module’s input signal can be sent to the master bus, adjusting the send level with the fader (9) and pressing the MASTER selector (6), and also to the auxiliary bus, adjusting the send level with the AUX ST rotary control (5), provided that the CHANNEL ON selector (8) is activated (pressed) to allow the signal to be sent. If the fader is put at the minimum position, it will have the same effect as if the CHANNEL ON selector (8) was pressed deactivating all the return sends (gone out).
• The output signal (11) of this module is obtained by summing all signals sent to the telephone busses (PHONE 1 or PHONE 2) from the OP-11, OP-22 and OP-78 channels.
• The monitoring of the signal is carried out on the PFL bus, activating the PFL OUT selector (4), and when the status LED is lit. This output signal is the signal that is being sent to the external telephone hybrid, adjusting its level on the GAIN rotary control (3).
• This module also features an interface for remote control (10) of external hybrids, if this would be necessary, as for example when using the AEQ TH-02ExmkII. In this case, an incoming call is indicated by the RING LED (2) being lit, and the connection of the hybrid to the telephone line (hook on / hook off) can be remote controlled by means of the CONNECT push button (1).
•  The remote control connector is a DB-9 male.

This module features special functions that can be programmed through the configuration jumpers described below:

• PDP1 and PDP2: Select the type of send to the auxiliary bus of the signal received from the hybrid. If the configuration jumper is located in PDP1 it is set to POST-fader send, and if located in PDP2 it is set to PRE-fader set.
• PDP3, PDP4: Select the remote modes. PDP3 sends + Vcc through the AIR contact (pin nr. 5 of the connector (10)). PDP4 sends ground through the AIR contact.
• PDP5: Connects contacts GND and AIR (pins nr. 9 and 5 of the connector (10)).
• PDP6: Telephone bus 1
• PDP7: Telephone bus 2