Specifications

V.3229 / V.3229L <C#>-E

<Re

erence>

Test Procedures

modem receives and then retransmits the data back

to the local mode. If digital bilateral loop is enabled

at the remote, the remote DTE islooped back toitself.

¥An alternative to the above procedure is to request

the operator at the remote modem to configure his

modem for LOCAL DIGITAL LOOP. Configure the

local modem for TEST PATTERN. The remote

modem receives and retransmits the data back to the

local modem.

¥The TEST PATTERN ERRORS display will count

received errors.

¥At the local modem, the indicators should be:

¥To further test the modem and communications link,

reverse the system loopback. First exit the existing

loopback test. Reverse the roles of the local and

remote modems and repeat step two.

Note: If the bilateral digital loop is enabled at the

local modem, the DTE interface is looped to itself

through the modem and permits the DTE and inter-

face circuitry to be checked.

Step 3

This step determines the performance of the tele-

phone line. This test is valid for 4-wire operation

only.

¥Configure the modem for REMOTE ANALOG

LOOP WITH TEST PATTERN. This signals the

remote to connect its receive pair to its transmit pair

through a buffer amplifier stage. The test pattern

transmitted locally is now looped back to the local

modem.