ADTRAN BR1 Job Aid page 2

TR ISDN
STATUS LEDs
NT1 I/F
CLEI:DDRPLRC1AA
TRI I/F
LOOPBACK
ACT
OPTIONS
S1-1 SX
ON Default and normal condition. Provides between 4 to 10 mA of sealing
current toward the customer's NT1/TA.
OFF Disables sealing current to the customer's NT1/TA.
S1-2 TEST
ON Used for factory test only.
OFF Default and operational mode.
COMPATIBILITY
ON Indicates a loss of signal from or synchronization
with the 2B1Q BRI interface towards customer's
NT1.
FLASHING Once per second indicates receipt of a Near End
Block Error from the 2B1Q BRI interface.
ON Indicates a loss of signal or synchronization with
the TRI-C (Total Reach ISDN CO) unit
FLASHING Once per second indicates receipt of a Near End
Block Error from the TRI-C unit
ON Indicates the TRI-R unit is in a 2B+D loopback
FLASHING Oncer per second for B1 loopback, twice per second
for B2 loopback
ON Indicates the terminal equipment has exchanged
ACT bits with the ISDN switch
FLASHING Once per second indicates that the ACT bit is being
sent from only the terminal equipment (CPE)
DEPLOYMENT GUIDELINES
TOTAL REACH SC PAM SIDE
Maximum Loop Loss .......................46 dB @ 20 kHz using a 135 ohm termination
52 dB @ 28 kHz using a 135 ohm termination
Maximum Noise................................34 dBrn using a 135 ohm termination with a 50 kB filter
Maximum DC Resistance.................2000 ohms
Maximum Single Bridged Tap...........2 kft
Maximum Total Bridged Tap..............6 kft
Maximum # of Bridged Taps..............3
Nominal Voltage.................................-130 VDC from TIP (GND) to RING (-130 v)
Note: Bridged Tap length must be included as part of the total loop length.
U-INTERFACE SIDE
Maximum Loop Loss .......................42 dB @ 40 kHz using a 135 ohm termination
Maximum Noise................................33 dBrn using a 135 ohm termination with a 50 kB filter
Maximum DC Resistance.................1300 ohms
Maximum Single Bridged Tap...........3 kft
Maximum Total Bridged Tap..............6 kft
Maximum # of Bridged Taps..............3
Voltage.................................-48 VDC from TIP (GND) to RING (-48 v)
T400 EDGE CONNECTOR PIN ASSIGNMENTS
55 TIP , U-Interface
49 RING, U-Interface
47 RING, Total Reach Interface
41 TIP , Total Reach Interface
27 Frame GND
11 Frame GND
Note: ISDN connections are not polarity sensitive
JOB
A
ID
FOR COMPLETE I&M PRACTICE 877.457.5007
DOCUMENT # 094
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