CMX228S1 MX-COM, Inc., CMX228S1 Datasheet - Page 21

• 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
%B3 (X.25 Transmit Packet Size)
Defines the maximum number of bytes that may be transmitted in an X.25 packet.
%B13 (Network User Identification String)
A maximum of 32 ASCII characters. The default value is an empty string. The Network User Identification
(NUI) string is used to identify the terminal to the packet switched network if necessary. If there is at least one
character present, the NUI is transmitted to the network when the call is established.
%B18 (User Data)
Up to 12 ASCII characters. Default is an empty string. The X.25 user data field which is sent when the X.25
call is established.
4.6.2.2 X.25 Parameters
All %D registers can be viewed using the %Dn? command.
%D0 (Default receive Window Size (Negotiated))
Defines the default maximum number of X.25 packets that may be received before an acknowledgement is
sent, only in use if %B0=0.
%D1 (Default Transmit Window Size (Negotiated))
Defines the default maximum number of X.25 packets that may be transmitted before an acknowledgement is
expected, only in use if %B1=0.
%D2 (Default Receive Packet Size (Negotiated))
Defines the default maximum number of bytes that may be received in an X.25 packet, only in use if %B2=0.
%D3 (Default Transmit Packet Size (Negotiated))
Defines the default maximum number of bytes that may be transmitted in an X.25 packet, only in use if
%B3=0.
%D9 (Group Number)
Defines the group number used in outgoing call setup messages.
MX-COM, Inc
4800 Bethania Station Road, Winston-Salem, NC, 27105-1201, USA
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Value
0 (default)
7
8
9
10
Range
1 to 7
Range
1 to 7
Value
7
8 (default)
9
10
Value
7
8 (default)
9
10
Range
0 to 7
Description
Use the default value appropriate to the type of call, without negotiation,
see %D registers.
Negotiate for a maximum 128 bytes per packet.
Negotiate for a maximum 256 bytes per packet.
Negotiate for a maximum 512 bytes per packet.
Negotiate for a maximum 1024 bytes per packet.
Default
Default
Description
Maximum 128 bytes per packet.
Maximum 256 bytes per packet.
Maximum 512 bytes per packet.
Maximum 1024 bytes per packet.
Description
Maximum 128 bytes per packet.
Maximum 256 bytes per packet.
Maximum 512 bytes per packet.
Maximum 1024 bytes per packet.
Default
2
2
4
Description
Default receive window size.
Description
Default transmit window size.
Description
Group number.
21
2000 Chiron Technology Limited
CMX228 Advance Information
Doc. # 20480216.001
2000 MX-COM, Inc.