User`s guide

USER’S GUIDE
60 SFVRA Connection Manager
RESTRICTIONS
Data rates are required for all users. The base data rate value represents the data rate of one
channel. This rate can be specified as either 56000 bps or 64000 bps. The initial data rate and the
maximum data rate are used in combination with the base data rate. The initial data rate determines
the number of calls that will be attempted when opening the first wide area connection. It provides
a mechanism to request that a group of parallel connections be made rather than a single
connection. For example, if the base data rate is set at 64000 bps, and the initial data rate is set at
256000 bps, the CyberSWITCH would attempt to make four (256000/64000 = 4) connections
running in parallel. The maximum data rate determines the total number of connections that can
be committed to a single logical connection. For example, if the base data rate is set at 64000 bps,
and the maximum data rate is set at 512000 bps, the CyberSWITCH would allow a maximum of
eight (512000/64000= 8) connections to be committed to a single logical connection.
The Call Restriction feature provides the ability to place limits on the toll costs of operating the
SFVRA Connection Manager. Call Restriction consists of a variety of features that can restrict the
number of switched calls made to remote sites, and also limit the amount of call minutes
accumulated for remote site access.
Notes: When a condition occurs that triggers a call disconnection, a message will be written to the
Problem Log, noting statistical information about the call, and stating “Time Restriction”
as the failure type.
For example, if the network’s total amount of connect time is estimated to be less than three hours
per day, call restrictions could be set up to place a limit on the number of call minutes per day to
240. (Three hours would be 180 minutes; however, there may be some unusual days that go over a
little, hence, 240 minutes.) If a newly installed application starts sending out packets on the LAN
that causes remote connections to be made all the time, the system will terminate the call, and
prevent any more calls from being made after 4 hours (240 minutes) of connect time to the remote
site. Thus, the phone bill would be limited to just four hours of connection time.
Call Restrictions is disabled by default. If are enabling Call Restrictions, you must configure non-
zero values for each parameter in order for calls to be accepted. In addition, the value for the
maximum minutes per call cannot be greater than the maximum minutes per day, and the
maximum minutes per day cannot be greater than the maximum minutes per month.