Table of Contents
Advertisement
363-206-285
Issue 2, February 2000
BBF1/BBF1B DS1/BBF3/BBF3B DS1PM
34. Determine from office records the length of the DS1 cabling between the
DDM-2000 and the DSX-1 cross-connect point.
35.
NOTE:
Switch 1, sections 1 through 3 (S1-1, S1-2, S1-3), are set according to
the length of DS1 cabling between the DDM-2000 and the DSX-1
cross-connection. Switch 1, sections 4 through 7 (S1-4, S1-5, S1-6,
S1-7), are set for the type of line coding (B8ZS or AMI) required of the
DS1 signal. Switch 1, section 8 (S1-8) on the BBF1/BBF1B DS1 is
unused and ignored by the system. On the BBF3/BBF3B DS1PM, S1-8
must be set to OFF.
NOTE:
To set switch to ON, depress rocker or slide switch toward side labeled
ON in the figure. To set switch to OFF, depress rocker or slide switch
toward side labeled OFF in the figure.
Refer to Table J and Figure 5 and set LBO option switches.
Table J – DS1/DS1PM Cable LBO Settings (Note)
613C (608C)
Cable Length
(feet)
0 to 133
>133 to 267
>267 to 400
>400 to 533
>533 to 655
Note: Invalid switch settings will cause the FAULT LED to light and a
DS1 CP failed alarm.
Other Cable
1249C Cable
dB Loss at
Length (feet)
772 kHz
0 to 90
0 to 0.6
>90 to 180
>0.6 to 1.2
>180 to 270
>1.2 to 1.8
>270 to 360
>1.8 to 2.4
>360 to 450
>2.4 to 2.8
DDM-2000 OC-3 M
Detailed Level Procedure:
Switch S1 Settings
S1-1
S1-2
S1-3
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
ON
ON
OFF
OFF
ULTIPLEXER
DLP-523
Page 20 of 30
Hide quick links:
Advertisement
Table of Contents
