ADTRAN DSU/CSU Installation And Maintenance Manual

CONTENTS
1. GENERAL ..................................................................... 1
2. OPTIONS ...................................................................... 2
3. INSTALLATION ........................................................... 3
4. TESTING ....................................................................... 3
5. REMOTE PROVISIONING AND
DIAGNOSTICS ............................................................. 4
6. DEPLOYMENT GUIDELINES .................................... 5
7. WARRANTY AND CUSTOMER SERVICE ............... 6
FIGURES
Figure 1. TROCU DP Preferred Option ............................. 1
Figure 2. Total Reach DDS Circuit Diagram ..................... 1
Figure 3. Option Switch ..................................................... 2
Figure 4. Rate Selection ..................................................... 2
Figure 5. OCU Loopback at the TROCU DP ..................... 4
Figure 6. TROCU DP Bidirectional Loopback
Pass-Thru Mode ................................................. 4
Figure 7. TROCU DP Bidirectional Loopback
Normal Mode ..................................................... 4
TABLES
Table 1. Preprovisioning ..................................................... 3
Table 2. Cable Type Loss Data @ 13.3 kHz ....................... 3
Table 3. LED Indicators ..................................................... 5
Table 4. TRDDS Insertion Loss Measurements ................. 5

1. GENERAL

This practice provides installation and maintenance
procedures for the ADTRAN D4 Total Reach Office
Channel Unit Dataport (TROCU DP) Preferred
Option. The unit is illustrated in Figure 1.
Document Revision History
Issue 2 of this document revises the Deployment
Guidelines subsection.
Description
ADTRAN D4 TROCU DP Preferred Option is a
functional replacement for the D4 OCU DP,
delivering data at rates up to 64 kbps on a single
copper pair. Used in combination with the Total
Reach Digital Data Service Remote termination unit
(TRDDS-R), the TROCU DP can accommodate
extended loop lengths eliminating the need for DDS
repeaters. The TROCU DP span powers the remote
TRDDS-R located at the customer premise. The
TRDDS-R converts the two-wire signal to the
Trademarks: Any brand names and product names included in this document are
61291006L2-5B
trademarks, registered trademarks, or trade names of their respective holders.
Model TROCU DP Preferred Option
Total Reach All-Rate DDS Dataport
®

Installation and Maintenance

Section 61291006L2, Issue 2
CLEI Code #D4D3MPY_ _ _

Figure 1. TROCU DP Preferred Option

traditional four-wire Alternate Mark Inversion (AMI)
signal for presentation to the customer.
The TROCU DP occupies a single channel position in
the WECO ® compatible D4 channel bank or the
AT&T ® SLC-96 Mode I and III terminal. It provides
the interface between a DS0 timeslot of the T-carrier
data stream, and the two-wire metallic loop extending
to the customer premises.
The TROCU DP may interoperate over the carrier
system with another TROCU DP, an OCU DP, a DS0
DP, a 1/0 DCS, or the central office switch. The unit
can be located in an end office, hub office,
intermediate office, or remote terminal digital carrier
system (see Figure 2). The two-wire loop is
connected using the tip (pin 24) and ring (pin 51) on
the D4 backplane.
D4 or SLC-96
TR 2-Wire Loop
T-Carrier
OCU
DP
T/R Pair

Figure 2. Total Reach DDS Circuit Diagram

Section 61291006L2-5
Issue 2, June 1999
D P
T R O C U
6L 2
12 91 00
IR E
S D 4 2- W
SC
64
56
19 .2
9.6
SY NC
LO SS 4.8
2.4
NE AR
SW 56
CR C
FA R
CR C
RE M
Q M
AP
DI SC
NO
DS U
LB K
ID LE
L
Rx O
(O UT ) G
I
C
Tx
(IN )
Customer Premises
4-Wire Customer
Interface
TRDDS-R
DSU/CSU
1