Polycom RealPresence Resource Manager System Operations Guide Working in the RealPresence Resource Manager
8 Polycom, Inc.
Managing Bandwidth
The RealPresence Resource Manager system manages the bandwidth between
sites and the bandwidth for calls that it schedules within the gatekeeper region
it services.
Users with administrator permissions can create bandwidth management
policies by setting the following limits. The RealPresence Resource Manager
system applies the lowest value from the settings described here to limit the
bit rate of specific calls or conferences.
• The maximum bit rate for a call at a site. Set it by editing the site, selecting
Routing/Bandwidth, and setting the Call Max Bit Rate.
• The total bandwidth between sites. The link type and bandwidth are
parameters of the site links between two sites. Set it by editing the site link.
• The maximum speed (bit rate) for calls across a site link. This value is
also a parameter of the site links between two sites and is set by editing the
site link.
• The specific speed (bit rate) of calls in a conference. This value is a
parameter of the conference, as it is inherited from the conference
template. You can achieve granularity of bandwidth management by (a)
creating a variety of scheduling roles, (b) creating a variety of conference
templates with different conference speeds, (c) associating different
scheduling roles with different templates, and (d) associating different
users and/or groups with the different scheduling roles.
For example, you can assign an executive user or group more bandwidth
than your typical user. To do this, create a VIP role and assign it
scheduling or advanced scheduling permissions. Then create a VIP
conference template that has a higher video speed, say 4096 kpbs. Finally,
associate the executive user or group with the VIP role.
There are some things to note in these situations.
— TheRealPresence Resource Manager system may reduce bandwidth
or fail a call if the requested bandwidth is not available.
— Schedulers with advanced scheduling permissions can choose to
change the speed of calls in conference by changing the value for a
specific conference. However, the RealPresence Resource Manager
system only allows a connection speed when it is within the
parameters set for the site link.
— Endpoints in a conference may not be capable of transmitting at the
requested speed. In this case, they will transmit at the value they can
achieve that is closest to the value set for the conference.
• The maximum speed (bit rate) for receiving calls and the preferred
speed for placing calls provisioned on the endpoint. These values are
parameters of the endpoint. For endpoints in dynamic management
mode, these values are provisioned as part of the user group provisioning
