Black Box LRU4240 - Manual (Page 81)

Dual Trunk E1 Router
Dual Trunk E1 Router User’s Guide TECHNICAL: 0118 96 56 000 69
Lamp Test
Use this test to verify the LEDs. During the test, all LEDs on the front panel illuminate.
All Zeros Used for verification of B8ZS.
1:4 (or Alternate) The 1:4 code is the loopup remote code. Typically, it is used when the loopup remote test
fails to place the remote system into loopback. You can determine if the failure is an
intermittent or a hard failure by continuously sending the 1:4 code, and monitoring the
network status to see if the pattern is being received.
The selections are available on the full link and on NET 1 and NET 2.
Note: If the Loop Up Remote test fails to place the remote system into loopback, check
that the Loop Code and Network Framing parameters are the same at each end of the link.
1:2 The 1:2 code is the loop down remote code. Use it when the Loop Down Remote test fails
to terminate the remote loopback. You can determine if the failure is an intermittent or
hard failure by continuously sending the 1:2 and monitoring the network status to see if the
pattern is being received.
The selections are available on the full link and on NET 1 and NET 2.
User 1/User 2 These two user programmable patterns (up to 24 characters) let you create a test pattern
rather than use pre-programmed patterns.
Table 8-2 Send Test Types Descriptions
Send Test Type Pattern Test Description