User guide

36
Chapter 3 - Front & Rear Panel Descritpions
Channel
Indicator Description
Channel 1-8 The Channel Receive (RCV) and Transmit RCV/
XMT(XMT)indicators show the activity level on each
channel.MultiMux MMH904 uses Channel One
through Channel Four indicators. The MultiMux
MMH908 can connect up to eight async devices
which use Channel One through Channel Eight
indicators.
Internal Composite Link (MMH2834 Modem)
Indicator Description
CD The Carrier Detect (CD) indicator lights when the
MMH2834 composite link modem detects a carrier
signal from the remote link modem.
XMT The Transmit (XMT) indicator flashes as data is
being transmitted by the MMH2834 modem to the
remote multiplexer.
RCV The Receive (RCV) indicator flashes as data is
being received by the MMH2834 modem from the
remote multiplexer.
CTS The Clear To Send (CTS) indicator lights when the
MMH2834 composite link modem is ready to
transmit data.
28.8, 24.0, These composite link speed indicators display
19.2, 14.4 the receive baud rate of the internal composite link.
OH The Off-Hook (OH) indicator lights when the
composite link is off-hook
TR The Terminal Ready (TR) indicator lights when the
MMH2834 modem is permitted to answer an
incoming call. When the indicator goes off, the
connected composite link modem will disconnect.
EC The Error Correction (EC) indicator is on solid when
the MMH2834 modem is in errorcorrection mode
and flashes on and off when compression is active.
DBUP The Dial Back up (DBUP) indicator lights when the
MMH2834 modem is in dial back up mode.