OSI/AS and OSI/TS Supplement (Includes RFC-1006 Support)

ER-TPDU
TPDUs Used by RFC-1006
107751 Tandem Computers Incorporated 5–13
ER-TPDU The Error (ER) TPDU is unchanged when using RFC-1006. Figure 5-9 illustrates the
ER-TPDU.
Figure 5-9. ER-TPDU
Octet
1 2 3,4 5 6-p
LI
ER DST-REF Reject Cause Variable Part
TPDU Header
115
LI
The length indicator shows the TPDU header length in octets. This value does not
include the length of LI and User data. The value is indicated by a binary
number with a maximum value of 254 (1111 1110). This value is in octet 1.
ER
The error code is set to 0111 0000. This value is in octet 2.
DST-REF
The destination reference is set to 0. This value is in octets 3 and 4.
Reject Cause
The reject cause indicates the reason the TPDU was rejected. This field can have
the following values:
Value Meaning
0000 0000 A reason is not specified.
0000 0001 Invalid parameter code.
0000 0010 Invalid TPDU type.
0000 0011 Invalid parameter value.