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MLT3.0/ISDN CHANNEL TEST (TA 1500 ONLY)
Channel Test (LUNT Mode)
Upon detection of the Test Initiative Voltage (116Vdc behind 8kΩapplied to Tip with Ring open)
the LUNT does the following:
■
The channel unit sends a Channel Test mp-eoc message downstream to the LULT, signaling
the request for a MLT channel test.
■
The channel unit notifies the BCU/SCU that a MLT test is underway.
■
The unit sends a 333.3 Hz tone between the tip and ring leads. This tone is compliant with
TR-TSY-OO465.
■
When the Test Initiative Voltage is removed, the active test status indication to the BCU/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:
■
The channel unit notifies the BCU/SCU that a MLT test is underway.
■
The LULT connects the bypass pair. This connects the customer drop to the common
equipment through TEST_R and TEST_T. The set-up sequence is complete.
■
Upon completion of the automatic test the bypass relay de-energizes.
■
The channel unit then 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 to perform upstream and down
stream testing.
TELECOMMUNICATIONS CODES
This product is intended to be installed in products providing a Type “B” or “E” enclosure, and
in a Restricted Access Location.
This device complies with Part 15 of the FCC rules. Operation is subject to the following two
conditions: (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
Warranty for Carrier Network products manufactured by ADTRAN and supplied under Buyer’s
order for use in the U.S. is ten (10) years. For a complete copy of ADTRAN’s U.S. Carrier
Network Equipment Warranty: (887) 457-5007, Document 414.
Navigate through menus to perform desired function.
Note: To traverse through the menus,select the desired entry and press Enter. To work backwards in
the menu,press ESC (escape key).
Testing – Test functions can be activated through front panel Bantam jacks,the ADMIN port,or
inband loopback sequences.
TESTING
■
Loopback tests – initiated from either the ISDN switch or the faceplate 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 loop-
back sequences for B1 and B2, when configured Adjacent-to-Customer and the D channel is dis-
abled.
CONNECTIONS
■
All connections are made through the 50-pin amphenol connector on the back panel TA
750/850/1500.
APPLICATIONS
PRICING ANDAVAILABILITY 800.827.0807
TECHNICAL SUPPORT 800.726.8663
RETURN FOR REPAIR 256.963.8722
www.adtran.com
U-BR1TE
CUSTOMER
NT1
TOTAL ACCESS 1500/750 TOTAL ACCESS 1500/750
Adjacent to
Switch
Tandem Office
(Source)/U-Repeater
Tandem
Office (Sink)
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Adjacent to
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2-Wire
T Carrier
T Carrier
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2-Wire
2-Wire 2-Wire
2-Wire
ISDN
S
WITCH
CUSTOMER
NT1
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1
1
8
1
1
0
1
L
1
P
W
R
D
S
X
T
S
T
L
P
1
L
P
2
A
L
M
TOTAL ACCESS 1500/750TOTAL ACCESS 1500/750
TOTAL ACCESS 1500/750
TOTAL ACCESS 1500/750
8
7
CODE INPUT OUTPUT
PC C C
TC - X
IC A -