Communication Protocols - Panasonic DX-2000 Service Manual

10.8 Communication Protocols

The set of conventions necessary to achieve facsimile-compatible service covers basic data transport, document data formats,
message (document) addressing, delivery confirmation, and message security.
Protocol supported by the DX-2000 is as follows:
TCP 3 Way Handshake &
Opening Session
[5 minutes]
[5 minutes]
[5 minutes]
[2 minutes]
[3 minutes]
[3 minutes]
[10 minutes]
According to RFC1123, there are two approaches for timeouts in the sender-SMTP:
1. limit the time for each SMTP command separately, or
2. limit the time for the entire SMTP dialogue for a single mail message.
A sender-SMTP SHOULD use option (a), per-command timeouts.
Timeouts SHOULD be easily reconfigurable, preferably without recompiling the SMTP code.
The value of timer [ ] shown above are recommended by RFC1123.
SMTP Command & Reply Procedure
DX-2000
(ef1.labo.mgcs.com)
Opening TCP Connection (TCP Port No. 25)
220 sv2.labo.mgcs.com Service ready
MAIL FROM: <xxx@sv2.labo.mgcs.com>
RCPT TO: <yyy@sv2.labo.mgcs.com>
250 Start mail out;end with <CR/LF> . <CR/LF>
221sv2.labo.mgcs.com Service closing transmission channel
Closing TCP Connection (TCP Port No. 25)
HELO sv2.labo.mgcs.com
250 ef1.labo.mgcs.com
250 OK
250 OK
DATA
DATA BLOCK 1
DATA BLOCK 2
DATA BLOCK n
CR/LF . CR/LF
250 OK
QUIT
342
SMTP Server
(sv2.labo.mgcs.com)