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T1 Phonebook Configuration MultiVOIP User Guide
288
PhoneBook Configuration Parameter Definitions
(cont’d)
Field Name Values Description
Single Port Protocol (SPP)
Mode Direct,
Client, or
Registrar
SPP voip systems can operate in
two modes:
in the direct mode, where all
voip gateways have static IP
addresses assigned to them; or in
the registrar/client mode, where
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
The UDP port on which data
transmission will occur. 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-trans-
mission
(in ms)
If packets are lost (as indicated by
absence of an acknowledgment)
then the endpoint will retransmit
the lost packets after this
designated time duration has
elapsed. (Default value = 2000
milliseconds.)
Max
Re-trans-
mission
Number of times the voip will re-
transmit a lost packet (if no
acknowledgment has been
received). (Default value = 3)