The NST segment allows network statistical information to be passed between the various systems on the network. Some fields in this segment refer to portions of lower level protocols; they contain information that can be used by network management applications monitoring the state of various network links.
Figure C-2. NST attributes
SEQ |
LEN |
DT |
R/O |
RP/# |
TBL# |
ITEM# |
ELEMENT NAME |
1 |
1 |
ID |
R |
0136 |
01173 |
Statistics Available |
|
2 |
30 |
ST |
01174 |
Source Identifier |
|||
3 |
3 |
ID |
01175 |
Source Type |
|||
4 |
26 |
TS |
01176 |
Statistics Start |
|||
5 |
26 |
TS |
01177 |
Statistics End |
|||
6 |
10 |
NM |
01178 |
Receive Character Count |
|||
7 |
10 |
NM |
01179 |
Send Character Count |
|||
8 |
10 |
NM |
01180 |
Messages Received |
|||
9 |
10 |
NM |
01181 |
Messages Sent |
|||
10 |
10 |
NM |
01182 |
Checksum Errors Received |
|||
11 |
10 |
NM |
01183 |
Length Errors Received |
|||
12 |
10 |
NM |
01184 |
Other Errors Received |
|||
13 |
10 |
NM |
01185 |
Connect Timeouts |
|||
14 |
10 |
NM |
01186 |
Receive Timeouts |
|||
15 |
10 |
NM |
01187 |
Network Errors |
C.2.2.0 NST field definitions
Definition: This field contains an indicator if statistics are available. Refer to HL7 table 0136 - Yes/no indicator for valid values.
N - the responding system does not keep any statisticsIf the value "N" is specified, the response message is used to signify to the initiating application that the particular link is operational (and fields 2-15 are empty in the response message).
Y - the responding system does keep statistics", fields 4 and 5 are required, (and the response message contains one or more non-null fields in the range 2-3, 6-15).
Definition: This field identifies a particular lower level link (e.g., a port number).
Definition: This field identifies (in certain systems) whether a lower level source identifier is an initiate or accept type. Refer to HL7 table 0332 - Network source type for valid values.
Value |
Description |
I |
Initiate |
A |
Accept |
Definition: This field contains the date/time stamp of the start of the collection of the statistics reported in fields 6-15 of this segment. It is strongly recommended that this value include seconds.
Definition: This field contains the date/time stamp of the end of the statistics collection period reported in fields 6-15 of this segment. It is strongly recommended that this value include seconds.
Definition: This field contains the number of characters received.
Definition: This field contains the number of characters sent.
Definition: This field contains the number of messages received.
Definition: This field contains the number of messages sent.
Definition: This field contains the number of messages received with checksum errors.
Definition: This field contains the number of messages received with length errors.
Definition: This field contains the number of "other" invalid messages received (excluding length and checksum errors).
Definition: This field contains the number of connect timeout errors.
Definition: This field contains the number of timeouts while waiting for a response to an initiated message.
Definition: This field contains the number of network errors in response to an initiated message.
Fields 2-15. These are all marked optional since the statistics kept on a particular link and negotiated between the two systems in question will vary. Not all values will apply to each system. Some values are concerned with the type of port, and some values pertain to the lower level protocol.