Patton electronic 2500RC, 2520RC, 2510RC user manual THE V.52 BER TEST PATTERN GENERATOR

5.4 THE V.52 BER TEST PATTERN GENERATOR

The Model 2500RC Series has a built-in test pattern generator and detector. It can be invoked at both ends of a link simultaneously (using two operators) or it can be invoked in conjunction with the LAL or RDL tests (using one operator). The following example requires two operators–one to initiate and monitor the test at the local Model 2500RC Series, and one at the remote Model 2500RC Series. To use the V.52 BER test by itself, both operators should simultaneously follow these steps:

1.Locate the “511/511E” toggle switch on the front panel of the Model 2500RC Series and move it to the left hand side (see Note 1). This activates the V.52 BER test mode and transmits a “511” pseudorandom test pattern to the other unit. If any errors are received, the receiving CSU/DSU’s red “Error” LED will blink sporadically (see Notes 1 & 2, below).

2.If the test indicates no errors are present, move the V.52 toggle switch to the right hand side, activating the “511/E” test (see Note 2). The 511/E test transmits the 511 pseudorandom test pattern and injects intentional errors about once per second. If the test is working properly, the receiving CSU/DSU’s red “Error” LED will blinkregularly. A successful “511/E” test will confirm that the link is in place, and that the Model 2500RC Series’ built-in “511” generator and detector are working properly.

NOTE1: The 511 BER pattern can also be activated using the

software control port. Follow these steps: From a terminal, first go to the Main Menu and select item 3 to display the Software Switch Menu (Section 3.2.4) In the Software Switch Menu, select item “c” to go to the Send 511 Pattern Menu (see below). To send a 511 pattern, select item 1.

NOTE2: Control Port activation of the “511E” pattern is not possible. The “511E” pattern may only be activated using the front panel toggle switch.

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5.5SWITCHED 56 DIALING COMMANDS (MODELS 2510RC & 2520RC)

CAUTION! For proper Switched 56 operation, you must enable the Circuit Assurance and Force RTS options as described in Section 4.0. Failure to do so may prevent the Model 2500RC Series unit from answering incoming Switched 56 calls.

To access the Switched 56 dialing capabilities of the Mode 2500RC Series, go to the Main Menu (see Section 3.2.4) and select item 5, “Set Switched 56 Dialing Parameters”. This will take you to the Switched 56 Menu (see below). The following paragraphs describe the commands in the Switched 56 Menu.

Store Phone Number (Enable DTR Dialing)

Selecting item 1 in the Dial Menu lets you activate the Model 2500RC Series’ “DTR Dialing” feature by storing a phone number in the unit’s non-volatile memory. The Model 2500RC Series automatically dials this number when the DTE raises the DTR lead. When you issue this command, the Model 2500RC Series responds with this prompt:

Enter up to 12 digits (without hyphens or other alphabetic characters), followed by [RETURN]. For example: “13015551212.”

CAUTION! Pressing [RETURN] by itself will erase any previously stored number from the unit’s non-volatile memory and cannot be undone. This will also disable DTR dialing.

NOTE: To disable DTR dialing, press [RETURN] (and nothing else) when asked to enter the number to be stored.

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