# h324RoundTripDelay

Sends a round trip delay message to the remote terminal.

#### Prototype

DWORD h324RoundTripDelay ( MSPHD msphd)

Argument | Description
msphd | MSPP handle associated with the MUX endpoint.

#### Return values

Return value | Description
SUCCESS |
CTAERR_NOT_FOUND | msphd was not found. Neither h324Start nor h324Delete were called.
H324ERR_INTERNAL_ERROR | Internal error in the 3G-324M Middleware.
H324ERR_MUTEX_LOCK_FAILED | Internal error trying to lock mutex.
H324ERR_NOT_INITIALIZED | h324Initialize was not called first.

#### Events

Event | Description
H324EVN_ROUND_TRIP_DELAY | Remote terminal responded to the round trip delay message.
H324EVN_ROUND_TRIP_TIMEOUT | Remote terminal did not respond.

#### Example

ret = h324RoundTripDelay( GwConfig[0].MuxEp.hd );
if ( ret != SUCCESS)
{
printf("h324RoundTripDelay. Return code is %x\n", ret);
return ret;
}