calls from unassigned callers are always displayed
in the call waiting window.)
n
Incoming Call Timeout Select: Incoming call LED
flash can be set for 15 seconds, or until the caller's
key is released.
n
TIF Enable/Disable: Currently, the MKP-4 can an
-
swer incoming telephone calls received by an RTS
Model TIF-951 Telephone interface. This an
-
swer-only capability can be disabled.
n
Speaker / Microphone Selection: A DIP switch, to
-
gether with the front panel Headset switch, permits
any of the following speaker / microphone combi
-
nations: external speaker / panel microphone;
headset earphones / microphone; external speaker /
4-pin dynamic microphone; headphones / panel
microphone.
n
Latching: The electronic latching feature for the
intercom keys can be turned on or off as previ
-
ously mentioned.
14) Address Select Switch: 16-position rotary switch:
Selects the keypanel's location in an intercom
group. The combination of intercom group number
and Address switch setting determines a keypanel's
unique address within the intercom system. Note:
Only positions 1-8 are used for Zeus and ADAM
CS intercom systems, or ADAM intercom systems
with 8-port Audio I/O cards. Only positions 1-C are
used for ADAM intercom systems with 12-port Au-
dio I/O cards. The remaining switch positions are
not used.
1.5 SPECIFICATIONS
Matrix Input/ Output
8 dBu nominal, 20 dBu maximum
Audio Performance
SNR at 8 dBu (A-weighted): > 70 dB
THD+N at 8 dBu (Unweighted): < 0.5%
Frequency Response at 8 dBu: ± 1.5 dB from 100 Hz -
20 kHz
CMRR: > 70 dB
Panel Mic Input
Mic Type: Electret condenser
Power: Phantom (+5V DC)
Nominal Level: -42 dBu
Maximum Level: -25 dBu
Connector Type: 1/4", 3-conductor phone jack.
Tip: +Audio and DC bias
Ring: -Audio
Sleeve: No connection
Headset
Mic
Type: Dynamic
Nominal Level: -55 dBu
Maximum Level: -40 dBu
Headphone
Impedance: 50 to 600 ohms
Output Power: 150 mW into 50 ohms
Output Voltage Level: 8 volts p-p maximum
Connector Type: D4F (Mates with A4M)
Pin 1: Microphone -
Pin 2: Microphone +
Pin 3: Headphone -
Pin 4: Headphone +
Speaker
Output: 4 Watts into 8 ohms maximum
Connector type: 1/4", 3-conductor phone jack.
Tip: Speaker +
Ring: Speaker -
Sleeve: No connection
Environmental
Operating Temperature: -20°C to 50°C
Storage Temperature: -40°C to 85°C
Humidity: 0 to 95%, non-condensing
Power Requirements
90 to 240 VAC, 47 / 63 Hz
Dimensions
1.72" (44mm) high x 8.19" (208mm) wide x 8"
(203mm) deep
Finish
Thermoplastic front panel, aluminum case, light gray
finish
Approvals
UL, CSA, VDE, CE
8 User Instructions MKP-4 Keypanel
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