CMX228S1 MX-COM, Inc., CMX228S1 Datasheet - Page 25

• Manufacturer Part Number: CMX228S1
• Description: ISDN data and telephony protocol engine with x.25
• Manufacturer: MX-COM, Inc.

ISDN Data and Telephony Protocol Engine with x.25
4.9
4.9.1
LED1 (HK1) is low when the POTS port is off-hook, high when on-hook.
LED2 (AA) indicates that register S0 has been set to 1 or more when low and set to 0 when high (RS232
Auto Answer indication).
LED3 (DCD) is low when a call is connected via the RS232 port (if &C0 is set to '1'), high when a call is not
connected to this port.
LED4 (RTS) is low if RTS on the RS232 port is active and vice versa, indicating flow control (RS232 Ready
To Send).
LED5 (RXD) is low if data is being sent to the DTE (RS232).
LED6 (TXD) is low if data is being received from the DTE (RS232).
LED7 (DTR) is low if the de-bounced DTR line on the RS232 port is active and vice versa.
LED8 (AR) is pulsed high and low until the ISDN line is activated, when it remains low constantly.
LED9 (CN1) is high when the POTS port is connected to the ISDN network, low when not connected.
ILFI is high when an ISDN Link Failure is Indicated, low when the link is operational.
The functions of the LED and ILFI indicators are set out in the table below:
MX-COM, Inc
4800 Bethania Station Road, Winston-Salem, NC, 27105-1201, USA
www.mxcom.com tel: [phone] 744 5050 fax: [phone]
All trademarks and service marks are held by their respective companies
Hardware Description
LED Status Indicators (LED1 to LED9, and ILFI)
Pin No.
12
13
14
15
16
17
18
19
21
54
Designation
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED9
ILFI
Off-Hook
ISDN Line Activated
Call Connected
ISDN Line Failure Indicator
POTS port
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~
~
~
~
25
Auto-Answer
Carrier Detect
Ready to Send
Receive Data
Transmit Data
Data Terminal Ready
ISDN Line Activated
ISDN Line Failure Indicator
RS232 port
2000 Chiron Technology Limited
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CMX228 Advance Information
Doc. # 20480216.001
2000 MX-COM, Inc.