Telex NI-223 Plus Key, Alert, Key, Send, Key, Group Call, Key, Direct Connect Call

- 10 - NI223Plus

4.2.1A-Key, Alert

The ‘A’ key is used to send an Alert function over the iDen® system. Using the standard dialing keys, enter the ID of the radio. Press the “A” key to send the alert.

4.2.2B-Key, Send

The “B” key is used as a send button when placing a manually dialed phone call. Take the phone line offhook, dial the number, and then press the “B” key to connect the call.

4.2.3C-Key, Group Call

Enter the group number to be called followed by the “C” key. When the PTT button is pressed, a group call will be completed.

4.2.4D-Key, Direct Connect Call

Enter the Direct Connect number then press the “D” key. When the PTT button is pressed, the Direct Connect call will be completed.

Figure 7 - Manual DTMF key layout with iDen® commands

5 Audio Alignment Procedure

5.1.1Transmit Audio Alignment

The Transmit audio (Audio IN) to the iDen® Radio should not be overdriven. The levels to the radio should be at or near -5dBm as measured at the IP-223 radio test point on the front of the unit. The TX Pot on the front panel of the IP-223 will be near 9-12 o’clock depending on the microphone source. Alternatively, the Software Gains may be adjusted to gain more granularity in the pot setting to accommodate different microphones. Figure 8 shows an example Transmit Gain setting. From here a simple talk test will result in good audio levels.

Figure 8 IP-223 Transmit Audio Gain Setup