Switch Settings - Nortel Circuit Card Installation Manual

Reference clock interface
The recovered clock derived from the facility is available on the MDF
connector. The signals at these connectors conform to the electrical
characteristics of the EIA RS-422 standard.

Switch settings

Various 2MB DTI switch options exist on the NTAK10. These are shown in
Table 236.
Table 236
2 MB DTI switch options
Switch
S1-1
S1-2
S2-1
S2-2
S3-1
S3-2
Note: The ON position for all the switches is toward the bottom of the
card. This is indicated by a white dot printed on the board next to the
bottom left corner of each individual switch.
NTAK10 2.0 Mb DTI card
Off
(Switch Open)
—
CC Enabled
120 ohms
75 ohms
non-French Firmware
—
Circuit Card
Page 733 of 906
On
(Switch Closed)
—
CC Disabled
75 ohms
120 ohms
French Firmware
—
Description and Installation