which is in Texas (TX), which is in the United States (USA) which is in North
America (NOAM). From this station, it was relayed on October 7 at 16:39 to the
KA0WIN BBS in Southeastern Colorado. By following this information it is pos-
sible to determine where the message traveled and when it was relayed from each
station. The information following the @BBS callsign is called the
hierarchical
routing information
(in this case .#WTX.TX.USA.NOAM).
When you connect to your local BBS and send a message, that BBS automati-
cally generates this R: line. As the message is sent to its destination, each BBS
adds its own R: line to the message. Besides the requirement of the FCC, the R:
line provides a method for any user, anywhere in the world, to send a reply or re-
spond to your message. As the message is passed through the many BBSs, each
BBS will add you into its White Pages — a directory of packet users. Each BBS
makes note that you (the originator of the message) sent the message, and that
you entered the message at the BBS listed in the last R: line in the message.
Because of this, a distant user can simply send a reply using the send reply (SR)
command of his local BBS. That BBS will then address the message to you using
the @BBS and hierarchical routing information in the last R: line of the message
you sent. A user may also simply use the send private command (SP) to send a
message to you. If the user does not enter complete addressing on his SP com-
mand, the BBS will attempt to look up your call in its White Pages and add the
routing automatically. However, if the user supplied complete addressing infor-
mation, the BBS would normally assume it is correct and not check the White
Pages.
BBSs use this hierarchical information to send the message back to you. The
message someone sent to you (using the above example) would be addressed to
URCALL @ N5IST.#WTX.TX.USA.NOAM. As the message passes through the
BBS system for forwarding, the BBS first looks at the callsign of the addressee
(URCALL). If that BBS doesn’t know how to forward the message to you, it then
looks at the @BBS field (N5IST). If it doesn’t have any information on how to
forward to N5IST, it looks at the first part of the hierarchical address (#WTX),
not knowing that, it would then look at the next part of the hierarchical address
(TX). Assuming this BBS is in the United States, it knows TX means Texas and
knows that this message needs to be relayed to a station in that area.
PBBS (Personal Mailbox)
Packet Modes of Operation
KAM’98 v 8.3
177
User’s Guide
Summary of Contents for KAM 98
Page 4: ...User s Guide ii KAM 98 v 8 3...
Page 18: ......
Page 132: ...Getting Started Other Topics User s Guide 114 KAM 98 v 8 3...
Page 160: ...blank page Non Packet Modes of Communication RTTY Operation User s Guide 142 KAM 98 v 8 3...
Page 342: ...blank page Command Reference KAM 98 Commands User s Guide 324 KAM 98 v 8 3...
