ADTRAN T200 H2TU-R, Руководство по установке и обслуживанию

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4 61222026L1-5, Issue 1 61222026L1-5A
Faceplate DS1 Bridging Jack
The H2TU-R provides DS1 bridging bantam jacks.
These jacks provide a test point for DS1 traffic to and
from the customer. For more details, refer to
subsection 4 of this practice.
3. CONNECTIONS
All connections of the H2TU-R are made through card
edge connectors.
Table 4
gives the card edge pin
assignments for the H2TU-R circuit pack.
When the circuit pack is installed in any of the
H2TU-R enclosures, all connections are made through
the enclosure backplanes. See the following
ADTRAN documents for more information:
• 61242007LX-5, HR12 Installation/Maintenance
• 61242008L1-5, HR4 Installation/Maintenance
• 61242034L2-5, T400 Single Mount Installation/
Maintenance (removable RJ-48 jacks)
• 61242034L3-5, T400 Single-Mount High
Voltage Installation/Maintenance
• 61245034L1-5, T200 Dual-Mount Installation/
Maintenance
ADTRAN’s T200 Dual-Mount housing (P/N
1245034L1) is required when using the T200 H2TU-R
for HDSL Loop Support System (H-LSS
TM
) protection
circuits.
NOTE
Ensure chassis ground is properly connected for
either standalone or shelf mounted applications.
4. HDSL2 SYSTEM TESTING
The T200 H2TU-R provides diagnostic, loopback, and
signal monitoring capabilities.
The six Faceplate LEDs provide diagnostics for
HDSL2 loops, DS1 signals, alarms, provisioning, and
loopbacks. See
Faceplate Indicators subsection on
previous page of this practice for details.
The H2TU-R provides local and remote loopback
capabilities via the loopback pushbutton on the
faceplate. The customer loopback and the network
loopback, for the bilateral loopback case, are logic
loopbacks within the HDSL2 transceiver. All other
network loopbacks at the H2TU-R are a metallic
loopback at the DS1 interface. See
Figure 3
.
The DS1 BRG jacks provide access for DS1 signal
monitoring.
DS1 Bridging Jacks
The jack labeled “BRG” provides a test access point
for monitoring the transmit and receive signals at the
DS1 interface point.
The bridging jack can be used in two different ways.
First, the bridging jack of the H2TU-R unit provides a
nonintrusive tap onto a signal line and permits the
connection of the test equipment to monitor the
characteristics of the signal with a DS1 test set
optioned for BRIDGING mode. Second, if the DS1
test set is optioned for TERMINATE mode and the
customer DS1 is disconnected, then the bridging jack
of the H2TU-R unit provides an intrusive tap and
could be used to transmit and receive signals between
the H2TU-R and the network.
Figure 2
is an
illustration of specific jack detail.
Figure 2. H2TU-R Bridge Diagram
Table 4. Card Edge Pin Assignments
Pin Designation Description
1 ........ CH GND ....... Chassis ground
5 ........ DS1-T1 ......... DS1 receive out tip (to customer
interface)
7 ........ H1-T ............. HDSL2 Loop tip (facility)
11 ....... CH GND ....... Chassis ground
12 ....... GND .............. Ground for protection switching
13 ....... H1-R ............. HDSL2 Loop ring (facility)
15 ....... DS1-R1 ......... DS1 receive out ring (to customer
interface)
17 ....... -48VR ........... -48 Vdc Return
20 ....... VCC .............. +5 Vdc for protection switching
27 ....... CH GND ....... Chassis ground
35 ....... -48V .............. -48 Vdc
40 ....... PROT-1 ......... Control line for protection switching
49 ....... DS1-R ........... DS1 transmit in ring (from customer
interface)
55 ....... DS1-T ........... DS1 transmit in tip (from customer
interface)
Tx
Rx
DS1
BRG
CPE
DS1
INTERFACE
H2TUR
T
R
T1
R1