Specifications

MultiVOIP Gatekeeper Software Guide 3 Main Window
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System
Allows the setting of values that control the amount of memory allocated for
managing H.323-opened transactions. You can let the Gatekeeper automatically
adjust the system values, or you can specify each value separately.
Auto Adjustment to Maximum Calls
Select to allow the Gatekeeper to automatically adjust the values to the setting in the
Maximum calls field.
Pool Size
The maximum size of the Protocol Value Tree (PVT) pool. The PVT is a dynamic data
structure used by the H.323 Protocol Stack to store needed information, such as
specific capabilities or a particular channel parameter. The PVT pool is the memory
used to store the PVT string.
Node Count
The maximum number of PVT nodes allowed in all trees in the system. There should
be a node for each field in an ASN.1 encoded message. For each string in a message,
such as for an alias, a node supplies 20 bytes of storage space, meaning that the
required nodes for the string is the number of bytes for the string divided by 20. Each
node requires 28 bytes. Allocation should take into account the memory available to
the system.
Channels
The maximum number of channels allowed in the system. A channel is a link
between a Protocol Definition Language (PDL) state machine and the network. The
PDL language is used for programming protocol-mandated procedures. PDL uses
ASN.1 data types as its own native data types. Each channel requires 40 bytes.
Allocation should take into account the memory available to the system.
Messages
The maximum number of messages allowed to queue simultaneously in all channels.
Each message requires 20 bytes. Allocation should take into account the memory
available to the system.
TPKT Channels
The maximum number of TPKT (TCP packet) channels allowed in the system. Each
TPKT channel requires 4.1 kilobytes. Allocation should take into account the memory
available to the system.
Protocols
The maximum number of PDLAPI protocols allowed in the system. PDLAPI is a
library of functions used by the H.323 protocol stack for initiating state machines and
sending or receiving events and messages. The PDLAPI calls the PDL Engine Library,
which manages the execution, multi-tasking, networking, encoding, and event
handling of PDL state machines and messages. Each PDLAPI requires 60 bytes.
Allocation should take into account the memory available to the system.
Maximum Procs
The maximum number of PDL state machines allowed in the system. Each requires
one kilobyte. Allocation should take into account the memory available to the system.