User guide

37
Chapter 3 - Front & Rear Panel Descritpions
Internal Composite Link (DSU)
Indicator Description
CD The Carrier Detect (CD) indicator lights when the
composite link DSU detects a carrier signal from the
remote MultiMux.
XMT The Transmit (XMT) indicator flashes as data is
being transmitted to the remote multiplexer on the
composite link.
RCV The Receive (RCV) indicator flashes as data is
being received from the remote multiplexer on the
composite link.
CTS The Clear To Send (CTS) indicator lights when the
composite link DSU is ready to transmit data.
56, 19.2 These composite link speed indicators display the
baud rate of the internal composite link.
RTS The Request To Send (RTS) indicator lights when
the MultiMux has data it wants to transmit over the
composite link
NS The No Signal (NS) indicator lights when no signal
at all is received from the DDS line or when the
signal is too weak for normal operation. This
indicator will also flash to indicate that errors have
been detected when using the Test Pattern
diagnostic feature.
OOS The Out Of Service (OOS) indicator lights when an
out of service signal is detected from the teleco.
TM The Test Mode (TM) indicator lights when the DSU
is placed in test mode.
Internal Composite Link (V29/V33 Modem)
Indicator Description
CD The Carrier Detect (CD) indicator lights when an
internal composite link 9600 or 14,400 bps modem
detects a carrier signal from the remote link modem.
XMT The Transmit (XMT) indicator flashes as data is
being transmitted from an internal composite link
9600 or 14,400 bps modem to a remote multiplexer.