User guide

Chapter 4 – Configuring Your MultiVOIP
64 MultiVOIP® Voice/Fax over IP Gateways
SPP Call Signaling Parameter Definitions
Field Name
Values
Description
Mode
Direct, Client,
or Registrar
In direct mode, all VOIP gateways have static IP addresses assigned to them.
In registrar/client mode, one VOIP gateway serves as registrar and all other gateways, being its
clients, point to that registrar. The registrar assigns IP addresses dynamically.
General Options
Port
port
The UDP port on which data transmission occurs. Each client VOIP has its 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 - 5000ms
If packets are lost (as indicated by absence of an acknowledgment) then the endpoint
retransmits the lost packets after this designated time duration has elapsed. (Default value =
2000 milliseconds.)
Max Re-
transmission
0 - 20
Number of times the VOIP re-transmits a lost packet (if no acknowledgment has been received).
(Default value = 3)
Client Options
Client Option fields are active only in registrar/client mode and only for client VOIP units.
Primary Registrar
--
This is the preferred SPP registrar gateway for controlling the traffic of the current VOIP.
Alternate Registrar
1 and 2
--
A first and a second alternate SPP Registrar gateway can be specified for use by the current
VOIP for situations where the Primary Registrar gateway is busy or otherwise unavailable.
Registrar IP Address
n.n.n.n
This is the IP address of the registrar VOIP to which this client is assigned. (Default value =
0.0.0.0; effectively, there is no useful default value.)
Registrar Port
10000 or
other
This is the port number of the registrar VOIP to which this client is assigned. (Default port
number = 10000.)
Polling Interval
integer
60 - 300
The interval between the VOIP gateway’s successive attempts to connect to and 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
(seconds)
Time-out duration before a registrar un-registers a client that does not send its “I’m here”
signal. Client normally sends its “I’m here” signal every 20 seconds. Timeout default = 60
seconds.
Proxy/NAT Device Parameters
Behind Proxy/NAT
device
Y/N
Enables MultiVOIP (running in SPP Registrar mode) to operate ‘behind’ a proxy/NAT device
(NAT = Network Address Translation).
Proxy/NAT Device
Parameters – Public
IP Address
n.n.n.n
The public IP address of the proxy/NAT device which the MultiVOIP is behind.