Specifications

Chapter 5 Monitoring and Diagnostics Installation and Operation Manual
5-8 Detecting Errors Optimux-34 Ver. 2.81
Table 5-3. Diagnostic Loops
Loop Function
E1 local An incoming E1 signal is looped back to the E1 line. AIS is injected towards the E13.
E1 remote The received E1 signal is looped back towards the link. AIS is injected in the E1 signal towards
the E1 line.
E3 local The outgoing E3 signal is looped back towards the E1 port. Unframed AIS (all 1’s) is injected in the
outgoing E3 signal towards the link and propagated to the E1 signals in the remote Optimux-34.
E3 remote The received E3 signal is looped back towards the link. AIS is injected in the E1 signal towards
the E1 line.
V.35 local An incoming V.35 signal is looped back to the V.35 line.
Note : This loop can be activated by the user or from the external DTE connected to the V.35
interface.
V.35 remote The received V.35 signal is looped back towards the link.
Note: This loop can be activated by the user or from the external DTE connected to the V.35
interface.
•
• Before setting the E3 local loop, set the clock source to INT.
• V.35 loops can be set via the supervisory terminal/MNG station or by the
external DTE connected to the V.35 interface. When set by external DTE, this
loop can be deactivated only by the DTE.
E1, V.35, and E3 Loops on the Remote Unit
E1, V.35, and E3 loops can be performed on the remote unit in the same way as
on the local unit.
³ To perform an E1, V.35, or E3 loop on the remote unit:
• Set the Device Number as Remote from the Diagnostics menu, while the
terminal or network management station (NMS) is connected to the local unit.
•
• Before initiating loops using the DCE, Optimux-34 must be in No Loop state.
Otherwise, the command will be cancelled.
• Once the DCE initiates the loop, it must also cancel it. Any attempt to cancel
the loop using the Optimux-34 will be ignored.
• If a loop is initiated via the DCE pins, it can be deactivated only by the DCE.
Optimux-34 ignores any attempt to deactivate this loopback via the
supervisory terminal.
Setting Loopbacks in the Optimux-34
The local loopback (LLB) timeout can be set for the local device and for the
remote device.
Notes
Notes