Specifications

Page 8–4
FOCUS System Manual
8.4 Specifications
The Framer Module’s technical specifications are
shown in Tables 8-1, 8-2 & 8-3.
8.4.1 Status Indicators
The Framer Module status indicators, are shown
in Figure 8-1. The red/green status LED is green if
the module is functional and red if the module is
non-functional or if there is a problem with the
Maintenance Module. The remaining six LEDs,
which are all red, help you to troubleshoot trans-
mission and synchronization problems in a
network.
Beginning at the top left, they indicate the
following, when lit:
LB E/W – The east or west link has been put in
local loop back, using the FOCUS Configuration
Software (FCS).
LB N/S – The north or south link has been put in
local loop back, using the FCS.
CRC – (Cyclic Redundancy Check) The trans-
mitted signal from the distant end is not being
received 100% correct by the local chassis.
FRAMER – (Frame synchronization) There is a
loss in synchronization of the receive signal from
a direction other than the synched direction.
SYNC LOSS – (Synchronization) There is a loss
in synchronization.
REMOTE ALARM – The transmitted signal
from the local chassis is not being received by the
distant end.
Figure 8–1. Framer Module Status Indicators.
Frame ESF - T1
Format Multi-frame, CAS, E1
Indicators Status LED
Loop back north or south
Loop back east or west
Framer synchronization lost
Blue alarm
Yellow alarm
Synchronization lost in sync
direction
Functions Provides 24/30-channel T1/E1
framing
Supports up to 4 T1/E1 ports
Can supply time sync source
as the system master
Can act as slave, synchroni-
zing on either XCVR 1-1,
1-2, 2-1, or 2-2 incoming
data streams
Table 8–3. TE1 Framer Specifications.
(T1 or E1 Systems, for use with MV5)