DMA OperationsGuide Call Server Settings
222 Polycom, Inc.
Allow calls to inactive
endpoints
If this option is selected, the Call Server considers
inactive as well as active endpoints when attempting to
resolve an address using the Dial registered endpoints
by alias dial rule (see “The Default Dial Plan and
Suggestions for Modifications” on page 228).
Turning this option off can prevent the aliases of
registrations that are no longer active from masking the
aliases of endpoints registered to other call servers.
This is useful in situations where an endpoint might
have an active registration with one Call Server and an
inactive registration with another (such as a mobile
device that moves from a Call Server handling
registrations through an SBC to a different Call Server
in the network).
Terminate calls based
upon failed responses
to IRQs
If this option is selected, the Call Server terminates a
call if it sends an IRQ (Information Request) to the
endpoint and receives either no response or an IRR
(Information Request Response) containing an
invalidCall field. This is the correct behavior according
to the H.323 ITU Specification, and it prevents a call
license from being used unnecessarily for a call that’s
no longer active.
Some endpoints (VVX prior to v.4.0.1, Sony PCS1,
XG80, and G70, and possibly others) don’t properly
handle IRQ/IRR messaging, causing active calls to be
disconnected if this option is selected. To avoid this
problem with such endpoints, leave this option off.
Gatekeeper call mode Direct call mode — The gatekeeper processes only
H.225.0 RAS call control messages. The endpoints
exchange other call signaling and media control
messages directly, bypassing the gatekeeper.
Routed call mode — The gatekeeper proxies all H.323
signaling messages.
Available bandwidth
limit (percent)
Sets the maximum percentage of the available
bandwidth that can be allocated to a single call.
If the requested bandwidth exceeds this value, the
gatekeeper “downspeeds” (reduces the bit rate of) the
call, but only to the user’s downspeed minimum.
If there is insufficient bandwidth to comply with both this
setting and the downspeed minimum, the call is
rejected.
Location request hop
count
The initial hop count the gatekeeper uses when it sends
LRQs to neighbored gatekeepers.
Location request
timeout (seconds)
The number of seconds to wait for a response from a
neighbored gatekeeper.
Table 10-1 Fields on the Call Server Settings page (continued)
Field Description