Interface Description EMII-1900 Service Manual Application Information
EMII-1900 V1.0 AnyDATA.NET Proprietary
Use Subject to Restrictions
4.2.2 Signal level of RXD/TXD
PC
RS232
TX
RX
01 03
DTS-800
Vout= 2.8V
+3V +3V
MSM_input
MSM_output
SIPEX207
+4V
V
EMII-1900
02 04
RS232
PHONE
TX01
RX02
TX04
RX03
V
MAX
= 7.68V
V
MIN
= -7.68V
V
MAX
= 6.50V
V
MIN
= -6.64V
V
MAX
= 3.00V
V
MIN
= 0V
V
MAX
= 3.9V
V
MIN
= 0V
[Figure 4-2]
Signal Level of RXD, TXD
4.3
LED State Indication
Name
Enable
Description
1
D1(IDLE)
Low
Stable State
2
D2(BUSY)
Low
State that Data transmit and receive between DTE and DCE
3
D3(SMS)
Low
Shot Message Service
4
D4(PWR)
Low
Power ON/OFF
4.4 The function of Real Audio Test( including Voice Test)
NAME
TYPE
DESCRIPSION
MIC+
I
Microphone audio input
MIC-
IS
Ear/microphone set detect
EAR
O
Ear audio output
GND_A
Audio ground
