User guide

Troubleshooting 6-3
6
Make sure Connection is set to Modem and two valid telephone numbers
are set in Phone Number 1 and Phone Number 2 in Menu 8 Alarm II.
Make sure Block all Alarms is set to No in Menu-7 Alarm and the occurring
alarm is set to Enabled.
Current Tests Terminate Without My Intervention
Make sure the Solo E1 DSU is set to run the test for an unlimited amount of
time.
Test length options are 15 min, 1 min, 60 min, Unlimited.
The Solo E1 DSU can not Enter Network Loopback from the
Carrier
Verify:
¥ The network carrier is sending a network loopup code.
¥ The Solo E1 DSU is set to receive loopup codes, not alternate loopup
codes.
¥ The Solo E1 DSU is set to receive the same or alternate code as the
network.
Using your E1 test set, send a loopup code into the Solo E1 DSU.
The Unit Suffers Loss Of Signal or Loss Of Frame on the
Network Port
An RAI is sent in the direction of the network port.
In the alarm menu, the Network status reports ÒLoss of SignalÓ or ÒLoss of
FrameÓ and CTS is de-asserted.
Unframed All 1s Are Received On The Network Port
In the alarm menu, set the Network status to ÒRAI Received.Ó
The RLSD line on the DATA port is de-asserted.
Typically represents an E1 service alarm.
The Solo E1 DSU can not enter into Payload Loopback from
the Network
Make sure the Solo E1 DSU is set for V.54 fractional loopback code, if the
network is sending V.54 to loop it up.
Make sure the payload portion you are attempting to loopup has assigned
bandwidth.