Nortel Networks CTA 500dm manual Calling Line ID, DSR Operation, RI Operation

Models: CTA 500dm

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DSR Operation

AT commands 61

DSR Operation

The DSR Operation Command

&Svalue

sets the operation of the DSR pin. The following table shows the allowable values.

Value

Use

0DSR is always on (default)

1DSR is on after protocol is installed (not supported)

The DSR signal is turned on at start-up to be compatible with Windows95 Plug and Play requirements. This corresponds to a &S setting of 0. No other DSR values are supported.

Result Codes

OK Appears when the value is supported.

ERROR Appears when the selected value is not recognized or is not supported.

RI Operation

The RI pin is asserted on detection of an incoming call that the

CTA 500dm is allowed to accept.

Normal public network cadencing is provided. The RI signal is asserted for 2 seconds, then negated for 4 seconds. This cycle continues until the call is answered, disconnected by the caller, or the CTA 500dm resets (for example, assertion of DTR if &D is 2 or 3).

Calling Line ID

If Calling Line IdentiÞcation is available on an incoming call and is enabled, a single indication is provided both with the Þrst RING indication and when the RI signal is asserted.

The indication occurs in one of two formats. The Þrst is an additional string of numbers that appears with the RING indication. For example, if the calling number is 123-4567, the Þrst RING

P0873832 Issue 05

CTA 500dm On Line Guide

Page 61
Image 61
Nortel Networks CTA 500dm manual Calling Line ID, DSR Operation, RI Operation