Specifications

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

<Re

erence>

Test Procedures

FALLBACK RATES

Since there is no standard fallback procedure from

V.32b rates to V.22 rates, problems may arise when

a V.32 optioned for 14400 originates a call to a V.22

bis modem. If this is a problem, change the originate

modem speed to 2400 bps from the front panel or

with the AT command AT%B3.

MODEM AND

TELEPHONE LINE

CHECK

Step 1

¥Configure the modem for LOCAL ANALOG

LOOP WITH TEST PATTERN. This forces the

modem on hook, terminates the local modem leased

lines into 600 ohms, and connects the local modem

transmit output amplifier back to its own receiver.

Transmit input data from the terminal is inhibited and

is substituted with a V.52 test pattern.

¥This test checks operation of the local modem mod-

ulator and demodulator circuitry and should be at-

tempted at both local and remote sites if operators are

available.

¥When errors are present, the TEST PATTERN ER-

RORS display counts errors.

Note: The following LED illustrations show indica-

tions for diagnostic tests. These indications are valid

when DTE options are set by factory option set #1

and RTS is active from the DTE. Where indicated