# SID letters

FBB software presents a SID which looks like : [FBB-7.00-AB1FHMX$]

### What is a SID ?

- SID means System IDentifier
- A SID allows a system which connects the BBS to know if standard (or specific) features are supported or not

### Protocol

- The SID is always sent by the BBS as the first line after the connection
- A SID is composed of fields (at least two, maximum three) separated by a hyphen "-" .
- In FBB SID, I use three fields which are :

- The author string ("FBB" in my case)
- A version number or author data ("7.00" for instance)
- A list of features symbolized by letters optionnaly followed by a digit giving the version number. If no digit is given, version 0 is assumed

- The version number (ot author data) is optionnal
- The features of FBB software are :

- A : Acknowledge for personal messages
- B : FBB compressed protocole V0 supported
- B1 : FBB compressed protocole V1 supported
- F : FBB basic protocole supported
- H : Hierarchical Location designators supported
- M : Message identifier supported
- X : Compressed batch forwarding supported
- $ : BID supported (must be the last character of the list)