Dialogic 6.2 manual November 334

		Q.921/Q.931 Timers
	Table 16. Q.931 Timers (Level 3 Parameters) (Continued)
Data Type	Mnemonic	Definition
unsigned	t318	Q.931 Resume Request state timer. Default value
short		is 1200 (120 seconds).
unsigned	t319	Q.931 Suspend Request state timer. Default value
short		is 1200 (120 seconds).
unsigned	t3m1	Q.931 Maintenance SERVICE ACK timer. Default
short		value is 1200 (120 seconds). Default value must be
		used for NFAS configurations.
unsigned	t321	Q.931 NFAS D-channel backup timer. Default
short		value is 400 (40 seconds).

If layer 2 has been enabled, you will receive the data (termed payload) you expect with the layer 2 headers stripped off and all the data reliability checks already performed. If layer 2 has not been enabled, you will receive intact layer 2 packets, which will contain the payload. These packets will need to be processed, and a layer 2 stack will have to be implemented all the while extracting the payload.

HDLC packetization does not need to be enabled, instead you can choose the raw mode option. To do this, both HDLC headers will need to be either stripped off or recognized, and the layer 2 packet headers inside the HDLC headers to get to the payload.

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