ISDN Data and Telephony Protocol Engine (inc. X.25)
CMX228
Value
Description
0 (default)
Use the default value appropriate to the type of call, without negotiation,
see %D registers.
7
8
9
10
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.
%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.
1.5.6.2.2 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.
Range
1 to 7
Default
2
Description
Default receive window size.
%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.
Range
1 to 7
Default
2
Description
Default transmit window size.
%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.
Value
Description
7
Maximum 128 bytes per packet.
Maximum 256 bytes per packet.
Maximum 512 bytes per packet.
Maximum 1024 bytes per packet.
8 (default)
9
10
%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.
Value
7
8 (default)
Description
Maximum 128 bytes per packet.
Maximum 256 bytes per packet.
ã 1999 Consumer Microcircuits Limited
ã 1999 Chiron Technology Limited
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D/228/1
CMLMICRO [ CML MICROCIRCUITS ]
