ADTRAN 1200051L5, 61200051L1 Loopback DTE, Loopback Network, Loopback Protocol, Test Menu Tree

Chapter 5.Testing

1=STATUS

2=TEST

3=CONFIG

4=DIAL

Loopback DTE

1=Loopback DTE

2=Loopback Netw.

3=Loopback Proto

4=Loopback Remot

5=Test Remote

6=Lpbk Disable

7=NEBE/FEBE

8=Software Ver

9=Lpbk Both DTEs

10=Test 2047 Both

1=No Rem Lpbks

2=DDS Accepted

3=V.54 Accepted

4=DDS+V54 Accept

Figure 5-2

Test Menu Tree

This test causes the DTE port to loop back toward user equip- ment. This allows a bit error rate test (BERT) to be performed from the local end-user equipment to the ISU 2x64 to verify proper cable connection, etc. Either a BERT tester or DTE data packet test must be used for this test.

Loopback Network

This test forces the ISU 2x64 to loop back both the B1 and B2 channels toward the network. This can be used to allow a far-end user to perform a BERT all the way through the network.

Loopback Protocol

This test causes data to be looped back toward the network after passing through a selected protocol such as T-Link or BONDING. See Figure 5-3 for loopback points.

NETWORK

NET

IFCE

Network

RATE

ADAPTION

Protocol

DTE

DTE

IFCE

DTE

Figure 5-3

Loopback Points

24 ISU 2x64 Dual Port ISDN Service Unit User Manual 61200051L1-1D