Samsung OFFICESERV 7100 Service Manual page 79

2.5.13.2 Main Features
The Main Features of the PLIM board are as follows:
10/100 Mbps Ethernet switch of 16 ports
Layer-2 Level Management Ethernet switch interworked with the WIM board
Management/Unmanagement function in layer2 level
VLAN, 802.1D, 802.1s in layer 2 level
The PLIM board is classified into the EEPROM where data required to boot the system are
stored by the Viatech VT6526 Ethernet switch chipset, the PHY where digital data are
encoded or decoded by 4B5B and are processed by analog signals, the IDE bus of 8 bit that
performs management switching by inter-working with the WIM or MCP, and 1-port
Ethernet of 10/100 Mbps for speeding up the data traffic when working with the WIM.
By default, VT6526, which is a chipset that can or cannot perform management, has been
selected. The VT6526 is configured with the Bootstrap mode, EEPROM mode, and
Intelligent CPU mode. The Bootstrap mode sets a physical mode depending on whether
specific pins of the chipset are set to high or low at initial boot in non-management switch
mode. The EEPROM mode sets chipset configuration by getting register settings from the
NM24C08 connected to the VT6526 at initial boot. The Intelligent CPU mode is used when
inter-working with the WIM board. This mode obtains VT6526 switch chipset register
settings from the WIM board through 8-bit IDE bus and configures the settings. The LIM
board can any of the three modes.
The Viatech VT6108 chipset used as the Octal PHY of 10/100 Mbps supports the SMII,
S3MII, or RMII interface. The quality of RXCLK is improved in the S3MII interface
compared with SMII and its reliability is enhanced. Therefore, the S3MII interface has
been adopted. Also, the VT6108 supports Auto MDI/MDIX and is available to both straight
and cross-over cables. A LED on each port shows links and speed.
Restriction of PLIM board
When the PLIM board is used in OfficeServ 7100, there are restrictions for functions.
PoE function and Managed Switch function are not provided.
© SAMSUNG Electronics Co., Ltd.
OfficeServ 7100 Service Manual
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