2 61220010L2-5, Issue 3 61220010L2-5C
2. OPTIONS
Options and rate are selected with the front panel DIP
switches as shown in Figure 1 and listed in Table 1.
Customer Interface Transmit Line Build Out
When -10 dB (SW1-1) is ON, the IDSL OCU-R
transmits a -10 dB AMI signal across the 4-wire
customer interface toward the CSU/DSU. When OFF
is selected the unit transmits a 0 dB AMI signal
toward the CSU/DSU.
2-wire Integrated Services Digital Network (ISDN)
U-interface to the traditional 4-wire DDS signal for
presentation to the customer.
The IDSL OCU-R is a digital network interface
device located at the customer premises point-of-
demarcation. In addition to terminating the ISDN
U-interface, the IDSL OCU-R functions as a
regenerative loopback device supporting Telco-
generated testing. The IDSL OCU-R unit is
available in T200 mechanics and can be optioned for
0 or -10 dB output toward the customer. Figure 2
illustrates the IDSL OCU-R Circuit Diagram. The
IDSL OCU-R is powered from -120 Vdc constant
voltage supplied by a U-BR1TE with PWR, or -48
Vdc provided by a locally powered T200 compatible
mounting.
Features
• 2-wire DDS deployment provided over a
U-interface.
• Dual powering capability; Locally powered by
-48 Vdc provided by mounting assembly or by
-120 Vdc from a U-BR1TE with PWR.
• DB-9 craft interface access for provisioning,
testing, and performance monitoring.
• Frame IQ/ADS-6 provide physical layer and
Frame Relay PM and inband PM access
respectively.
• Protected loopback prevents false latching
loobpack at 64 kbps.
• Switch selectable data rate including subrates,
19.2 and 56 kbps rates, including secondary
channel, and 64 kbps clear channel capability.
• LED indicators for operational status.
• T200 mechanics.
• Transmits Abnormal Station Code upstream
during out-of-service 4-wire customer loop
condition.
Figure 2. IDSL/DDS Circuit Diagram
T-Carrier
Channel Bank
2-Wire Loop
4-Wire Customer
Interface
DSU/CSU
IDSL OCU-R
T/R Pair
Customer Premises
U
B
R
1
T
E
Table 1. Options
hctiwSnoitpircseD
CS
,65filennahCyradnoceSehtstcelesNO
detcelesera4.2ro,8.4,6.9,2.91
46atadlennahcraelck46stcelesNO
65
,NO=CSfi,dnaatadk65stcelesNO
atadlennahcyradnocesk65stceles
2.91
,NO=CSfi,dnaatadk2.91stcelesNO
atadlennahcyradnocesk2.91stceles
6.9
,NO=CSfi,dnaetaratadk6.9stcelesNO
atadlennahcyradnocesk6.9stceles
8.4
,NO=CSfi,dnaetaratadk8.4stcelesNO
atadlennahcyradnocesk8.4stceles
4.2
,NO=CSfi,dnaetaratadk4.2stcelesNO
atadlennahcyradnocesk4.2stceles
65WSnoitarepo65dehctiwSstcelesNO
Bd01-
yblangistimsnartSDDsecuderNO
Bd01yletamixorppa
MQgnirotinomytilauqselbaneNO
CE
ylnO.edomnoitcerrocrorrestcelesNO
rewolrok2.91fosetarrofdilav
NELL
gnihctalotdnopserottinuswollaNO
-nonotsdnopsersyawlatinu;skcabpool
skcabpoolgnihctal
elbanelliwedomatadk46nielihwFFO
syawlaeraskcabpoolgnihctal;erutaefBLP
edomsihtnidelbane
