Multi-Tech Systems MVP210/410/810-SS SPP Call Signaling Parameter Definitions, General Options

Chapter 4: Configuring your VOIP

		SPP Call Signaling Parameter Definitions
Field Name	Values	Description
Mode	Direct,	In direct mode, all VOIP gateways have static IP addresses assigned to them.
	Client, or	In registrar/client mode, one VOIP gateway serves as registrar and all other
	Registrar	gateways, being its clients, point to that registrar. The registrar assigns IP
		addresses dynamically.
General Options		The UDP port on which data transmission will occur. Each client VOIP has its
Port	port
		own port. If two client VOIPs are both behind the same firewall, then they must
		have different ports assigned to them.
		If there are two clients and each is behind a different firewall, then the clients
		could have different port numbers or the same port number.
		(Default port number = 10000.)
Re-transmission	50 -	If packets are lost (as indicated by absence of an acknowledgment) then the
	5000ms	endpoint will retransmit the lost packets after this designated time duration has
		elapsed. (Default value = 2000 milliseconds.)
Max Re-	0 - 20	Number of times the VOIP will re-transmit a lost packet (if no acknowledgment
transmission		has been received). (Default value = 3)
		Client Option fields are active only in registrar/client mode and only for client VOIP
Client Options
		units.
Primary Registrar	--	This is the preferred SPP registrar gateway for controlling the traffic of the current
		VOIP.
Alternate	--	A first and a second alternate SPP Registrar gateway can be specified for use by
Registrar 1 and 2		the current VOIP for situations where the Primary Registrar gateway is busy or
		otherwise unavailable.
Registrar IP	n.n.n.n	This is the IP address of the registrar VOIP to which this client is assigned.
Address		(Default value = 0.0.0.0; effectively, there is no useful default value.)
		This is the port number of the registrar VOIP to which this client is assigned.
Registrar Port	10000 or
	other	(Default port number = 10000.)
		The interval between the VOIP gateway’s successive attempts to connect to and
Polling Interval	integer
	60 - 300	be governed by a higher level SPP registrar gateway. The Primary Registrar is
		the highest level registrar gateway. Alternate Registrar 1 is second; Alternate
		Registrar 2 is the lowest order SPP registrar gateway.
Registrar Options		Registrar Option fields are active only in registrar/client mode and only for
		registrar VOIP units.
Keep Alive	30 – 300	Time-out duration before a registrar will un-register a client that does not send its
	(seconds)	“I’m here” signal. Client normally sends its “I’m here” signal every 20 seconds.
		Timeout default = 60 seconds.
Proxy/NAT Device Parameters
Behind	Y/N	Enables MultiVOIP (running in SPP Registrar mode) to operate ‘behind’ a
Proxy/NAT		proxy/NAT device (NAT = Network Address Translation).
device
		The public IP address of the proxy/NAT device which the MultiVOIP is behind.
Proxy/NAT	n.n.n.n
Device
Parameters –
Public IP Address

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