D
data access arrangement, 1-2 data compression, 4-59 data rates. See rates DATAKIT, 4-16, 4-38, 4-41 DataStream, 3-37
default configuration options, 2-11±2-12, 4-2, F-2±F-7 diagnostic control panel (DCP)
configurations. See configuration options description, 1-5±1-6, 3-2±3-3
menu tree, 3-9, 3-10, A-1±A-3
messages, 3-11±3-16, 3-18±3-19, 3-27±3-28 operation, 2-12, 3-7±3-9, 4-4±4-7, 6-7 status indicators (LEDs), 3-3±3-6
diagnostic tests. See Test branch dial
access security. See Security answering a call
auto-answer, 3-74, 4-19, 4-46
manual answer, 3-68, 3-75, 4-19, 4-46 backup, 2-5±2-6, 3-41±3-42, 3-65, 3-68±3-69, B-2 command modifiers, 3-72, 5-6
DCP controlled, 3-65±3-73 manual dial. See Talk/Data network connection, B-4±B-5
stored telephone number, 3-70±3-73, 5-13 Dial Line configuration options group, 4-22, 4-50 digital bridge, 1-9, 1-10
sample configuration, G-16 digital loopback, 3-58±3-59, 3-60±3-61 dimensions, 1-14
directory, telephone number, 3-70±3-73 disconnecting a call, 3-67 Download Software, 3-42±3-49
DTE
connection, 2-4±2-6, B-3 status, 3-3±3-6, 3-24
DTE Bridge. See digital bridging
DTE Dialer configuration options group, 4-41
DTE Interface configuration options group, 4-10, 4-33 dual leased-line operation. See backup, leased
E
EIA-232-D
cable connection, 2-4±2-6, B-3 pin assignments, C-2
status, 3-3±3-6, 3-24 end-to-end pattern test, 3-62 environment, 1-13 equipment
customer supplied, 2-2 list, 2-1±2-2
error control, 4-58
escape character ( + + + ), 4-42, 5-2, 5-16
F
faceplate, 1-5, 1-6, 3-3
factory default configurations, 2-11, 4-2, F-2±F-7 features, 1-7±1-8
firmware part number (FPt #), 3-23 firmware revision level (FRev), 3-23 firmware upgrades/download, 3-42±3-49 flow control, 4-60, 4-61
front panel. See diagnostic control panel function keys, 3-7, 3-9, 4-7
G
government requirements Canada, 1-12
United States, 1-11±1-12
H
handshaking sequence, 3-74, 3-75 hang up, 3-67
hardware part number (HPt #), 3-23 HDLC, 4-41, D-1
Health and Status definitions, 3-18±3-19, 3-27±3-28
I
Identity, 3-23
indicators, status (LEDs), 3-3±3-6 installation
Model 3920Plus, 2-3±2-12 Model 3921Plus, 2-6±2-10
K
keypad, 3-8±3-9
L
LCD (liquid crystal display) description, 3-2, 3-7±3-8 menu structure, 3-10
messages, 3-11±3-16, 3-18±3-19, 3-27±3-28 leased backup operation. See backup, leased Leased Line configuration options group, 4-24, 4-53 leased-line connection, 2-5±2-6
leased-line operation, 4-24±4-26, 4-53±4-57, B-2 LEDs (status indicators), 3-3±3-6
line connection dial, 2-5±2-6 leased, 2-5±2-6
Line Dialer configuration options group, 4-19, 4-46
