Patton electronic SmartNode 4110 Series manual Mode q921, Configuring Q.921 encapsulation

SmartWare Software Configuration Guide19 • ISDN configuration

Mode: q921

Step	Command	Purpose
1	node(q921)[slot/port]#protocol pp	Specify Q.921 operating mode (Default: BRI:
	or	pmp, PRI: pp).
	node(q921)[slot/port]#protocol pmp	The Q.921 protocol running on BRI ports can
		operate in point-to-point (pp) or point-to-multi-
		point (pmp) mode. Point-to-multipoint is used
		to connect multiple terminals to an ISDN S-
		Bus. In some cases small PBXs are also con-
		nected to the public ISDN in point-to-multi-
		point mode. Point-to-point is typically used to
		connect PBXs to a public or private ISDN.
		The Q.921 protocol of PRI ports always run in
		point-to-point (pp) mode.
2	node(q921)[slot/port]#uni-side auto	Specify the UNI side of the interface (Default:
	or	auto)
	node(q921)[slot/port]#uni-side net	If layer1 clock mode is not defined or set to
	or	auto this setting also specifies the clock mode
		for layer1.
	node(q921)[slot/port]#uni-side user
		NET: clock mode = master
		USR: clock mode = slave
		If set to auto the UNI side setting is taken from
		layer3.
3	node(q921)[slot/port]#[no] permanent-	Enables the Q.921 permanent activity
	layer2	(Default: disabled).
		By default, the Q.921 protocol is not enabled
		permanently, i.e. the first call enables it.

Configuring Q.921 encapsulation

This command specifies the next protocol or application has to be attached to the Q.921 protocol. In case of ISDN this will always be the Q.931 protocol but in a distributed system for example, it could also be a net- work protocol.

Mode: q921

Step

1

Command	Purpose
node(q921)[slot/port]#[no] encapsula-	Enables/Disables the next application or pro-
tion q931	tocol. Currently only Q.931 is supported.

Enter Q.931 configuration mode

Normally, Q.931 is running as ISDN Layer 3 protocol on Q.921. But it is also possible another protocol is using Q.931 as its next encapsulation step an then Q.931 will not be configured out of the Q.921 context. That means, Q.931 encapsulation can be configured in different configuration modes. For this reason, the

ISDN configuration task list 219