CMX218S1 MX-COM, Inc., CMX218S1 Datasheet - Page 18

• Manufacturer Part Number: CMX218S1
• Description: ISDN data and telephony protocol engine
• Manufacturer: MX-COM, Inc.

ISDN Data and Telephony Protocol Engine (no X.25)
&D (Data Terminal Ready)
Format: AT&Dn<CR>
Determines the CMX218 operation if DTR is lowered during a call.
If &D2 is set and DTR is low when an incoming call is received, the call is accepted and Ring Indication is
sent to the DTE. If an incoming call has been accepted and &D2 is set when DTR is lowered, the call is
cleared.
&F (Load Factory Profile)
Format: AT&F<CR>
Sets the following commands and registers to their default values.
It does not change the %A !B, !C registers or the &Z command.
Format: AT&F9<CR>
Sets all commands and registers to the default values and resets LED indicator and RS232 interface pins
accordingly.
&K (Flow Control)
Format: AT&Kn<CR>
Indicates the method of flow control to be used between the CMX218 and the DTE when in the data state.
There is no flow control when the CMX218 is in the command state.
Flow control is only active when in an active data call, i.e. not when dealing with Hayes commands.
Flow control is applied to the DTE in the following situations:
Flow control is applied to the remote end (the mechanism is protocol dependent) if excessive data is held
pending transmission to the DTE, so as to prevent local buffer overflow.
&V (View Active/Stored Profiles)
Format: AT&V<CR>
Causes the CMX218 to display the following command and register values for the stored profile:
&Z (Store Directory Number)
Format: AT&Z3={DN}<CR>
This command instructs the CMX218 to store a directory number. The stored directory number is then used
by the X.25 call setup as the ‘Calling NUA’.
A directory number consists of a string of characters from the set 0..9, $ and . The ‘=‘ character can be
omitted. Where a store number is entered, only the value 3 will give an ‘OK’ response. The contents of the
&Z directory number are displayed by using the &V0 command. Up to 20 digits can be saved. The number
must be in quotes. e.g. at&z3 =’12345’.
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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Commands:
Commands:
ii.
i.
Registers:
Registers:
Suffix n
0
2 (default)
Suffix n
0
3 (default)
The remote end signals flow control (the mechanism is protocol dependent).
Several buffers of data are held waiting transmission across ISDN.
S0
S0
E
E
S37
S37
Q
Q
Description
No action
B or D-channel data call is cleared and auto-answer is suspended until
DTR is raised again.
Description
No flow control
Bi-directional RTS/CTS signals
%B
%A
V
V
%D
!C
X
X
%E
&C
%E
&C
%B
&D
&D
%L
18
%D
&K
&K
%L
&Z
!B
2000 Chiron Technology Limited
CMX218 Advance Information
Doc. # 20480215.001
2000 MX-COM, Inc.