Nortel Circuit Card 311 Reference page 984

984 NTBK50 2.0 Mb PRI card
The remote loopback function causes the far-end device to transmit the
same data that it receives, using the jitter attenuated receive clock. The data
is additionally available at the far-end receive data outputs. Local loopback
causes the transmit data and clock to appear at the near-end clock and
receive data outputs. This data is also transmitted on the line unless an
Alarm Indication Signal (AIS) is transmitted instead.
CEPT transceiver
The transmitter and receiver functions are used for synchronization,
channel, and signal extraction. The functions meet applicable specifications
of the CCITT recommendation G.703 and G.732.
The transceiver provides transmit framing based on the 2.048 MHz clock
derived from the DS-30X system clock and 1 KHz framing pulse.
The transmitter and receiver functions are used for synchronization,
channel, and signal extraction. The functions meet applicable specifications
of the CCITT recommendation G.703 & G.732.
The transceiver provides transmit framing based on the 2.048 MHz clock
derived from the DS-30X system clock and 1KHZ framing pulse.
The transmitter and receiver functions are used for synchronization,
channel, and signal extraction. The functions meet applicable specifications
of the CCITT recommendation G.703 and G.732.
The transceiver provides transmit framing based on the 2.048 MHz clock
derived from the DS-30X system clock and 1 KHz framing pulse.
Slip control
Slip control provides organized recovery of PCM when the clock recovered
from the external facility is at a different frequency with respect to the local
clock.
Slip control provides organized recovery of PCM when the clock recovered
from the external facility is at a different frequency with respect to the local
clock.
Slip control provides organized recovery of PCM when the clock recovered
from the external facility is at a different frequency with respect to the local
clock.
D-channel support interface
The D-channel support interface is a 64 Kbps, full-duplex serial bit stream
configured as a DCE device. The data signals include:
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Copyright © 2003-2008, Nortel Networks
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receive data output
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008