Verilink DIU 2130 (880-503297-001) Product Manual - Manual (Page 39)

DIU 2130 Configuration
Verilink 3-15
Use F2 to turn Far End loopback on or off for port 2.
The Far End loop is also called a remote DTE loop, it is a loopback
test that takes place in the DIU and is bidirectional. A loop-up or
loop-down code is sent from the near site to the far site through
the T1. On the DIU at this site the Far End Loop LED will come on
for the port which is in loopback. On the DIU at the far site the Near
End Loop LED will come on for the port that is in loopback.
Alarm Enable If alarm reporting is enabled, messages will appear on the craft
interface screen as alarms occur and clear. If disabled, this does
not occur.
DIU Bus The DIU Data Bus option looks like:
DSU Bus (1)NONE (2)A (3)B (4)C (5)B,D&I EQ (6)A,D&I NET >
This very critical option determines the mode in which the CSU will
operate and which of the three busses in the shelf, if any, will be
used to pass data back and forth to DIU cards.
1. NONE—The CSU is in CSU mode. This means that all 24
timeslots are being passed directly through the CSU to an
attached DSX-1 T1 device, often used for PBX or telephone
switch applications. Note that in CSU mode (only) the DIU
clock option is not in effect, the actual behavior of the card is
passive as regards timing when CSU mode is selected.
2. A—The CSU is in mux mode and it is using bus A to pass data
back and forth to the associated DIU card(s). The equipment
interface is not in use in mux mode.
3. B—The CSU is in mux mode and it is using bus B to pass data
back and forth to the associated DIU card(s). The equipment
interface is not in use in mux mode.
4. C—The CSU is in mux mode and it is using bus C to pass data
back and forth to the associated DIU card(s). The equipment
interface is not in use in mux mode.
5. B,D&I EQ—The CSU is in a very rarely used mode (Tech
Support has never seen it used) in which the DIU data traffic is
being routed out the DSX-1 T1 equipment port to the local T1
equipment instead of out the T1 network port. This is called
the drop and insert toward the equipment. Unless your
requirement is exceptionally unusual, do not select (5)B,D&I
EQ.