Figure 1-1. Typical Point-To-Point Application For Dsu Iv Esp - ADTRAN DSU IV ESP User Manual

Chapter 1. Introduction
The DSU IV ESP provides both V.35 and EIA-232 electrical and
physical DTE interfaces to accommodate a variety of applications.
To ensure a reliable connection, the unit features an extended
receiver capability which permits operation over long loops (3.4
miles or 5.5 km of 26 AWG at 56 kbps).
The ESP 4-wire SW56 DBU card and the base unit's integrated
SW56 capabilities are compatible with AT&T Accunet and Sprint
SW56 type services. The V.34 DBU card allows switched backup
over the public switched telephone network (PSTN). The ESP ISDN
1B+D card is compatible with National ISDN and supports a U-
interface to the Basic Rate ISDN.
Figure 1-1 shows a typical point-to-point application for the DSU
IV ESP.
B
RIDGE
PCs
L
ocal
A
rea
N
etwork
P
RINTER
S
ERVER
DEDICATED
PRIVATE NETWORK
1-2
/R
OUTER
POWER SUPPLY
DSU III AR DSU III AR DSU III AR DSU III AR DSU III S4W
SHELF
CONTROLLER CONTROLLER
RS RS RS RS RS
CS CS CS CS CS
TD TD TD TD TD
RD RD RD RD RD
CD CD CD CD CD
ALM ALM ALM ALM ALM
DTE DTE DTE DTE DTE
LOOP LOOP LOOP LOOP LOOP
RDL RDL RDL RDL RDL RDL
PTRN PTRN PTRN PTRN PTRN
ERROR ERROR ERROR ERROR ERROR ERROR ERROR
DIALMATE
DIAL DIAL STATUS CANCEL
TEST CONFIG ENTER
SELECT SELECT SELECT SELECT SELECT SELECT
TEST TEST TEST TEST TEST TEST
1 2 3
4 5 6
7 8 9
0
1 2 3 4 5 6
4-wire
SW56
PUBLIC SWITCHED
DIGITAL NETWORK
4-wire
SW56
ENTER
CANCEL
DSU IV ESP

Figure 1-1. Typical Point-to-Point Application for DSU IV ESP

DSU IV ESP User Manual
POWER SUPPLY
DSU III S4W DSU III S4W DSU III S4W DSU III DBU DSU III DBU DSU III DBU DSU III DBU DSU S2W DSU S2W DSU S2W
RS RS RS RS RS RS RS RS RS RS
CS CS CS CS CS CS CS CS CS CS
TD TD TD TD TD TD TD TD TD TD
RD RD RD RD RD RD RD RD RD RD
CD CD CD CD CD CD CD CD CD CD
ALM ALM ALM ALM ALM ALM ALM ALM ALM ALM
DTE DTE DTE DTE DTE DTE DTE DTE DTE DTE
LOOP LOOP LOOP LOOP LOOP LOOP LOOP LOOP LOOP LOOP
RDL RDL RDL RDL RDL RDL RDL RDL RDL RDL
PTRN PTRN PTRN PTRN PTRN PTRN PTRN PTRN PTRN PTRN
ERROR ERROR ERROR ERROR ERROR ERROR ERROR ERROR ERROR ERROR ERROR
S 16 S
SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT SELECT
TEST TEST TEST TEST TEST TEST TEST TEST TEST TEST
MART
7 8 9 10 11 12 13 14 15 16
V.34
ISDN PUBLIC SWITCHED
NETWORK
TELEPHONE NETWORK
V.34
DSU IV ESP
C
A B C
1 2 3
D E F
4 5 6
7 8 9
SHIFT QUICK
* 0 #
B
RIDGE
HELF
P
RINTER
PCs
L
ocal
A
rea
N
etwork
/R
OUTER
S
ERVER
61204011L1-1