# RTP EMC keyword qualifiers

This topic alphabetically lists the RTP EMC keyword qualifiers. Each keyword is first followed by an optional default value and bracket-enclosed units specification. All of the keywords beginning with rtp are dynamic, since the user must provide the flow identifier part of them.

Individual objects are described for each keyword qualifier.

## RTP EMC keyword qualifiers

Parameter | Access | Syntax | Description
pollperiod | Read-only | Integer | Polling interval for each board-thread. This keyword indicates the interval at which RTP EMC board-threads poll their board for statistics. On average, the data cached by this RTP EMC cannot update more frequently than this interval. Decimal value between 1 and 31.

## RTP EMC keyword qualifiers

Parameter | Access | Syntax | Description
rtp | N/A | Struct | Top-level keyword. Base of all other dynamic keywords. The flow identifiers in qualifier keywords can be used to retrieve flow statistics, through access to either the keyword rtp.in-flow-identifier or the keyword rtp.out-flow-identifier. The bracket expression must be replaced by a valid flow identifier. Refer to the RTP EMC for a description of the flow identifier syntax. Normally the client obtains flow identifiers from OAM events instead of rtp keyword qualifiers.