Ricoh FAX2000L - Page 61

30 November, 1999 SYSTEM FEATURES
2-37
Detailed
Descriptions
Shift-down Request from Sending Terminal
If this machine has received four PPRs for one ECM block, it will request a two-
step shift-down to the receiving terminal in the next control channel.
Shift-up Request from Receiving Terminal
If this machine has sent two consecutive MCFs and detected a good line condition,
it will request a one step up-shift to the sender terminal in the next control channel.
MCF/
PPR
Fax data
Fax data
MCF
MPh
PPR
TX RX
6KLIWGRZQ
Fax data
PPR
Fax data
PPR
Fax data
PPR
MPh
Fax data
4
3
2
1
6619NESV
6619NESV
6619NESV
6619NESV
6619NESV
5;1;NESV
H545D563.WMF
Fax data
MPh
MCF
TX RX
6KLIWXS
Fax data
MCF
Fax data
MPh
Fax data
2
1
5917NESV
5;1;NESV
5917NESV
5917NESV
MCF
H545D564.WMF