Appendix E: Ip Network Components - Polycom MGC Administrator Administrator's Manual

Appendix E: IP Network Components

E-2
Table E-1: IP Network List of Components and Logical Entities
Name
SIP Servers—general
Registrar
MCU with IP card(s)
H.323
Required
The MCU includes IP+ cards that perform the network functions, such as
signaling and capabilities exchange for conferencing. Each IP card has a LAN
port that is assigned an IP address, a subnet mask, a default router and static
routes. For SIP sessions, this entity is considered to be a special type of User
Agent and a mixing component ('media mixer'). For conferences that include
SIP participants, IP+ cards from version 4.23 and above are required. For
H.323-only conferences, IP (12 or 24) cards are sufficient.
Subnet Mask
H.323
Required
The IP address of a device in the LAN network is represented by bits with
values between 0 - 255, grouped in four components. The Subnet Mask
indicates which of the address components in the IP address of a device
identify the network and which identify the host on that network. A subnet
component value of 255 indicates that the corresponding IP component
identifies the network, while any number between 0 to 254 indicates that the
corresponding IP component identifies the host on the network. The Subnet
Mask of a device allows other devices communicating with that device to
identify whether the device is on the same network or on another network and
whether a router is required to reach that device.
H.323
N/A
N/A
SIP
Required
SIP
Required
SIP
Optional
Optional
(recommended)