Table 3-3. Rear Accessory Jack Pin Functions - Motorola ASTRO XTL 2500 Installation Manual

Options and Accessories Installation: Accessory Connector Assembly Details (P2) (All Models Except 110W)
Pin
Pin Name
No.
1 GND
2 BUS+
3 BUS-
4 TXD
5 RXD
6 USB-
7 USB+
8 RESET
9 BUSY
10 CTS
11 RTS
12 USB PWR
13 CHAN ACT
1
This pin must be connected to ground by jumper on accessory cable if emergency is disabled, even if disabled by
CPS. If enabled, this line must be grounded via a switch, which is normally closed. The emergency debounce time
is programmable via CPS.
2
Pulling this line to ground will activate PTT function, activating the AUX_MIC input.
3
Fixed level (independent of volume level) received audio signal, including alert tones. Flat or de-emphasis are pro-
grammed by CPS. Output voltage is approximately 100 mVrms per 1kHz of deviation. The DC offset is 1.4V.
4
This output is used to detect when a rear microphone accessory is taken off-hook, to override PL to alert the user
to busy traffic prior to transmitting.
5
This microphone signal is independent of the microphone signal on the front microphone connector. The nominal
input level can support 300 mVrms for future APCO accessories. The DC impedance is 660 ohms and the AC
impedance is 560 ohms.
6
See Table 2-1 in Chapter 2 for wiring options.
Note: Please see the XTL 2500 Basic Service manual (Motorola publication part number 6815853H01) for more
detailed descriptions of these pins.
HLN6923A

Table 3-3. Rear Accessory Jack Pin Functions

Pin Function
Ground
SB9600 BUS+ Data
SB9600 BUS- Data
RS232 Transmit Data
RS232 Receive Data
USB - (Data)
USB + (Data)
SB9600 RESET
SB9600 BUSY
RS232 Clear-To-Send
RS232 Request-To-Send
USB Power (5V from USB
accessory/cable)
Channel Activity (qualified
received signal)
Pin
Pin Name
No.
14 GND Ground
15 EMERGENCY Emergency
16 PTT* Push To Talk
17 ONE WIRE One-Wire Data
18 VIP OUT 1 Vehicular Interface Output
19 VIP OUT 2 Vehicular Interface Output
20 SPKR+ Speaker + (3.2 ohm
minimum impedance)
21 RX FILT AUDIO Receive Filtered Audio Out
22 MONITOR Monitor Overrides PL
23 AUX MIC Rear Microphone Input
24 SW B+ Switched Battery Voltage
25 Ignition Ignition Sense
26 SPKR- Speaker - (3.2 ohm minimum
impedance)
3-11
Pin Function
1
2
3
4
5
6
October 12, 2005