CMX228S1 MX-COM, Inc., CMX228S1 Datasheet - Page 12

• 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
4.4
4.4.1
Configuration can be carried out at any time by causing the POTS port to go off-hook and then immediately
entering a configuration sequence of DTMF tones. The sequence signaled to the CMX228 will determine the
configuration to be performed, as shown in the following table.
Once the ‘$’ has been recognized, each digit pressed is then checked for validity as a configuration
sequence. If any digit pressed is not a valid configuration digit, all digits pressed so far will be transmitted to
the network in INFORMATION messages as Keypad Information Elements, until a ‘ ’ is entered (with the
exception of ‘$ ’ being entered, see Keypad Operation below). If the first four digits received are a valid
configuration sequence then the configuration mode is entered. When a valid configuration has been
completed the CMX228 will send a single DTMF tone to the POTS port. If a valid configuration sequence is
received but subsequent digits are invalid, then subsequent digits entered will be ignored and two DTMF
tones will be sent to the POTS port.
If the port goes on-hook part way through configuration, it will cause any digits received so far to be ignored.
Configurations can be performed consecutively with the exception of the test function (where the attached
handset must be replaced immediately after the configuration has been audibly signaled to the POTS port).
All configurations entered will be retained after a power-down as they are stored in the external EEPROM.
MX-COM, Inc
4800 Bethania Station Road, Winston-Salem, NC, 27105-1201, USA
www.mxcom.com tel: [phone] 744 5050 fax: [phone]
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$9$$1234567890
Configuration
Sequence
$90$n
$93$n
$94$n
$95$1
$96$1
$97$1
$02$
$90$
$93$
$94$
$95$
$96$
$97$
POTS Configuration
Configuration and Control via DTMF Keypad
Test watchdog
Clear MSN
Save Multiple Subscriber
Number (MSN)
Clear country code
Change country code
Clear channel mapping
Enable channel mapping
Disable Calling Party No.
transmit
Enable Calling Party No.
transmit
Disable DDI transmit
Enable DDI transmit
Disable line failure detection
Enable line failure detection
Initialize all configurations.
Name
Puts the CMX228 into a permanent loop, not
updating the external watchdog counter, so after
2s it should reset.
Clears any saved digits
n = MSN (up to 23 digits)
Country code is set to UK by default
n = country code
0 = UK
1 = Belgium
2 = Rest of Europe
Incoming calls on any channel are accepted
(provided other parameters are valid e.g. MSN).
Where n = 1 or 2 for the appropriate channel.
Outgoing call SETUP messages do not contain
any Calling Party Number Information Elements.
Outgoing call SETUP messages contain Calling
Party Number Information Element with number
set to saved MSN (if a number is present).
Prevents digits being transmitted to the POTS
port upon call connection.
Upon connection of a call on the POTS port, if
there was a Called Party Number Information
Element present in the incoming call setup
message, the digits are sent as DTMF tones to
the POTS port.
Once the CMX228 is de-activated it stays de-
activated until the network re-activates it or an
outgoing call needs to be made.
The CMX228 checks to see if the ISDN line is
activated and Layer 2 communications can be
made. It then sets the ILFI pin accordingly.
Resets all of the configuration variables back to
their default values.
12
Description
2000 Chiron Technology Limited
CMX228 Advance Information
Doc. # 20480216.001
2000 MX-COM, Inc.
No channel
Disabled
Disabled
Enabled
Default
Clear
map
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
UK