Nortel Circuit Card 311 Reference page 940

940 NTAK79 2.0 Mb PRI card
Table 393
Carrier shield grounding switch settings
NTAK79 provides for the capability of selectively grounding the shield of
the Tx and/or Rx pairs of the carrier. Closing (down) the on-board switch
applies FGND to the appropriate carrier cable shield. The switch settings
are shown below.
Table 394
Carrier shield grounding switch settings
Switch
S4-1
S4-2
The NTAK79 card provides the capability of selectively grounding the shield
of the Tx and/or Rx pairs of the carrier. Closing (down) the on-board switch
applies FGND to the appropriate carrier cable shield. The switch settings are
shown in
Table 395
Carrier shield grounding switch settings
Receiver functions
The receiver extracts data and clock from an AMI (Alternate Mark Inversion)
coded signal and outputs clock and synchronized data. The receiver is
sensitive to signals over the entire range of cable lengths and requires
no equalization. The clock and data recovery meets or exceeds the
jitter specifications of the CCITT recommendation G.823, and the jitter
attenuation requirements of the CCITT recommendation G.742. This
provides jitter attenuation increasing from 0 dB to 60 dB over the frequency
range from about 6 Hz to 6 KHz.
The receiver extracts data and clock from an AMI (Alternate Mark Inversion)
coded signal and outputs clock and synchronized data. The receiver is
sensitive to signals over the entire range of cable lengths and requires
no equalization. The clock and data recovery meets or exceeds the
jitter specifications of the CCITT recommendation G.823 and the jitter
Copyright © 2003-2008, Nortel Networks
.
Switch Carrier Pair
S4-1 Rx shield
S4-2 Tx shield
Carrier Pair
Rx shield
Tx shield
Table 395 "Carrier shield grounding switch settings" (page
Switch Carrier Pair
S4-1 Rx shield
S4-2 Tx shield
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
On
Open
Open
On
Open
Open
On
Open
Open
Off
GND
GND
Off
GND
GND
940).
Off
GND
GND