U-BR1TE WITH POWER
MLT3.0/ISDN CHANNEL TEST
Channel Test (LUNT Mode)
Upon detection of the Test Initiative Voltage (116 VDC behind 8k
Ω
applied to Tip with Ring open) the
LUNT does the following:
■
Sends a Channel Test mp-eoc message downstream to the LULT, signaling the request for a MLT
channel test
■
Notifies the SCU that an MLT test is underway
■
Sends a 333.3 Hz tone between the Tip and Ring leads. This tone is compliant with TR-TSY-00465
■
When the Test Initiative Voltage is removed, the active test status indication to the SCU is
removed, a Return to Normal mp-eoc message is sent to the LULT, and the U-Interface attempts
re-synchronization.
Channel Test (LULT Mode)
Upon receipt of the Channel Test mp-eoc message, the LULT does the following:
■
Notifies the SCU that an MLT test is underway
■
Connects the bypass pair. This connects the customer drop to the common equipment through
TEST_R and TEST_T. The setup sequence is complete.
■
Upon completion of the automatic test the bypass relay de-energizes
■
Attempts to re-synchronize the U-interface between the LULT and the NT1.
BANTAM TEST JACKS
■
Accommodate DS0 Logic Testers such as the TPI 108/109 RT II or an equivalent test set to
perform upstream and downstream testing.
COMPLIANCE
This product is intended to be installed in products providing a Type “B” or “E” enclosure, and in
a Restricted Access Location.
■
NEBS Level 3 compliant
■
Operating temperature range of –40ºC to +65ºC
This device complies with Part 15 of the FCC rules. Operation is subject to the following two con-
ditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Changes or modifications not expressly approved by ADTRAN could void the user’s authority to
operate this equipment.
WARRANTY
ADTRAN will replace or repair this product within the warranty period if it does not meet its
published specifications or fails while in service. Warranty information can be found at
www.adtran.com/warranty. U.S. and Canada customer Faxback: 877-457-5007, Document 414
Navigate through the menus to perform the desired function.
NOTE
: To traverse through the menus, select the desired entry, and press Enter. To work backward in
the menu, press Esc (escape key).
Test functions can be activated through front panel bantam jacks, the ADMIN port, or in-band
loopback sequences.
TESTING
■
Loopback tests – initiated from either the ISDN switch or the front panel via the local craft
interface in the Network-to-Customer direction
■
Point-to-point test – initiated via the local craft interface toward either the U-interface or the T1
carrier interface
■
Local Loopback – initiated from the local craft interface for either bearer channel
■
Leased Mode Testing – responds to independent network-issued OCU and CSU latching
loopback sequences for B1 and B2, when configured Adjacent-to-Customer and the D channel is
disabled
■
DS0 DP Latching Loopback sequences in B1 when D channel is off (B1, 2B)
■
EOC remapping of subsequent DS0 DP Latching Loopbacks to downstream elements
CONNECTIONS
■
All connections are made through the 50-pin amphenol connector on the Total Access 1500
backplane
SPAN POWER
The U-BR1TE span powers the IDSL OCU-R or a U-Repeater. Voltage measurements from Tip to
Ring is –120 VDC (with no termination). Tip to GND is 0. Ring to GND is –120 VDC (with no
termination) or less depending on voltmeter impedance.
DDS APPLICATION
ISDN APPLICATIONS
PRICING AND AVAILABILITY 800.827.0807
TECHNICAL SUPPORT 800.726.8663
RETURN FOR REPAIR 256.963.8722
www.adtran.com
61180020L2-22A
T-Carrier
Channel Bank
2-Wire Loop
4-Wire Customer
Interface
T/R Pair
Customer Premises
U-BR1TE
IDSL
OCU-R
DSU/CSU
7
8
Code
Input
Output
Power Code (PC)
F, C
C
Telecommunication Code (TC)
X
X
Installation Code (IC)
A
–
U-Repeater
ISDN
Switch
Customer Premises
U-BR1TE
U-BR1TE
U-BR1TE
U-BR1TE
U-BR1TE
U-BR1TE
NT 1
Customer
Premises
NT 1
T1
“
U
”
“
U
”
“
U
”
“
U
”
“
U
”
“
U
”
T1
T1
