page 37 of 45 GU-139-Z1
IA4100
Administrator Guide
Code Blue
• 259 Hedcor Street • Holland, MI 49423 USA • 800.205.7186 • www.codeblue.com
Phone Line – Ensure that the phone line is free of static and the electrical characteristics are satisfactory:
Loop Current: 23 mA to 35 mA (required)
Talk Battery: -48V DC to -52V DC (typical)
Ring Voltage: 90 Vrms (typical)
Electrical – Ensure that the unit is powered with 12 to 24V DC or AC power. If the unit is Solar or
NightCharge® ensure the battery voltage is above 11.5V DC.
EMI – Some sources of EMI (Electromagnetic Interference) will interfere with the operation and audio quality
of the unit. An example would be a bad ballast on a high pressure sodium or metal halide area light, or
communication cable run by a transformer or florescent light ballast.
GSM/Cellular – GSM and/or cellular interfaces cause distortion of DTMF tones. You may need to program
your IA4100 speakerphone with a line simulator or on a standard analog POTS/PBX station prior to
connecting to GSM/Cellular gateway.
Disconnect Supervision – Ensure that supervised disconnect is enabled on any PBX system the IA4100 may
be connected to. This will ensure the unit hangs up properly upon call completion.
Some systems will provide a momentary Polarity Reversal which will also hang up the speaker- phone.
Answer Supervision – If your system provides answer supervision, then it is possible that when the call is
connected the IA4100 will disconnect the call. This is due to the IA4100 considering the WINK signal sent for
answer supervision to be a disconnect signal.
Default Settings – Ensure your phone is programmed accordingly when connecting to auxiliary outputs. By
default the phone may be set to activate or not activate as required by your application. Refer to the
programming commands for more information and default settings.
If IA4100 Phone does not answer an incoming call...
1. Verify the phone you’re dialing is actually ringing on the correct phone line.
2. To verify if the problem is at the location or the IA4100 phone, swap it with one from a working location. If
the problem is at the location, the Ring Voltage and Frequency Hertz can be measured. If the problem
follows the phone, call Code Blue TSS. Note the serial number to verify warranty coverage.
3. Ring Voltage - Put your meter on the two wires (Tip & Ring) of the phone line. It does not need to be
connected to the phone (no load needed; 0 REN phone). Call the phone line and you should measure an AC
Ring Voltage between 50-130 Vrms during the ringing phase of the ring cycle. FCC standard is at least 90
VAC.
4. Frequency Hertz - Change your meter to measure AC or DC, but set for Hz. Put your probes on Tip & Ring
again and call the phone number associated to that line and the frequency during the ring cycle. You should
see a Hz range somewhere between 17-33 Hz. Not all meters can do this if your phone line is out of spec and
does not fall into these ranges. We offer an IA4100 phone with a firmware that opens to greater variances.
For more information, please contact Code Blue Technical Services & Support at tss@codeblue.com.
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