Editing Transaction Language 1 (section)

=== TL1 message structure ===
TL1 messages follow a fixed structure, and all commands must conform to it. However, the commands themselves are extensible and new commands can be added by NE vendors.

These are some of the message components:
* Target identifier (TID) & Source identifier (SID) - TID/SID is a unique name assigned to each NE. TID is used to route the message to an NE, SID is used to identify the source of an autonomous message.
* Access identifier (AID) - AID identifies an entity within an NE.
* Correlation tag (CTAG) & Autonomous correlation tag (ATAG) - CTAG/ATAG are numbers used to correlate messages.

====TL1 input message====
'''Example''':
{|
|-
|ENT-USER-SECU:MyNE:sridev:101::password;
|}
'''Structure''':
{| border=1 cellspacing=0
|-
| colspan=8 align=center | '''TL1 input message'''
|-
| colspan=3 align=center | Command code
| colspan=4 align=center | Staging block
| colspan=1 align=center | Payload block
|- 
| Verb||modifier1||modifier2
| TID||AID||CTAG||General block
| Data block
|- 
| ''ENT''||''USER''||''SECU''
| ''MyNE''||''sridev''||''101''||
| ''password''
|}

====TL1 output message====
'''Example''':
{|
|-
| MyNE 04-08-14 09:12:04
|-
| M 101 COMPLD
|-
| "UID=sridev:CID=CRAFT,UAP=1:"
|-
|;
|}
'''Structure''':
{| border=1 cellspacing=0
|-
| colspan=8 align=center | '''TL1 output message'''
|-
| colspan=3 align=center | Response Header
| colspan=3 align=center | Response Id
| colspan=1 align=center | Response block
| colspan=1 align=center | Terminators
|- 
| SID||Date||Time
| M||CTAG||Completion code
|
|
|- 
| ''MyNE''||''04-08-14''||''09:12:04''
| ''M''||''101''||''COMPLD''
| ''"UID=sridev:CID=CRAFT,UAP=1:"''
| '';''
|}

====TL1 acknowledgment message====
'''Example''':
{|
|-
| OK 100
|-
| <
|}
'''Structure''':
{| border=1 cellspacing=0
|-
| colspan=3 align=center | '''TL1 acknowledgment message'''
|-
| Acknowledgment code||CTAG||Terminator
|-
| ''OK''||''101''||''<''
|}

====TL1 autonomous message====
'''Example''':
{|
|-
| MyNE 04-08-14 09:12:04
|-
| A  101 REPT EVT SESSION
|-
| "root:NO,"
|-
| ;
|}
'''Structure''':
{| border=1 cellspacing=0
|-
| colspan=8 align=center | '''TL1 autonomous message'''
|-
| colspan=3 align=center | Auto Header
| colspan=3 align=center | Auto Id
| colspan=1 align=center | Auto block
| colspan=1 align=center | Terminators
|- 
| SID||Date||Time
| Alarm code||ATAG||Verb
|
|
|- 
| ''MyNE''||''04-08-14''||''09:12:04''
| ''A''||''101''||''REPT EVT SESSION''
|
|
|}