User`s manual

LINE STATUS REGISTER (LSR) 775022 (FOR SYNCHRONOUS LINE CARDS)
15 14
13
12
11
10
09
08
07
06 05 04
03
02 01
00
I I
R
I
R R R
'-
J
UNUSED
RING
CLEAR TO NEW TERMINAL
SEND SYNC READY
CARRIER ON DATA SET REO TO LINE
READY SEND ENABLE
MODEM STATUS
MODEM CONTROL
11-2693
LI N E STATUS REGISTER (LSR) 775022 (FOR ASYNCHRONOUS LINE CARDS)
1 5 14 1 3
LEGEND
R = READ ONLY
W=WRITE ONLY
W,,= WRITE ONES ONLY
X = UNUSED
, 2
11
_. FOR MAINTENANCE ONLY
10 09 08 07 06
RI N G CLEAR TO
SEND
CARRIER
ON
SECONDARY
RECEIVE
REO TO
SEND
LINE
ENABLE
MODEM
STATUS
SECONDA RY TERM I N A L
TRANSMIT READY
MODEM
CONTROL
11-4409
Figure 3-3 DV 11 Primary Registers (Sheet 3 of 3)
3-11