Samsung OfficeServ 500 Service Manual page 28

CHAPTER 1.Overview
3.3.3 Interface
The WBS24(Combo) consists of wire processing part and wireless processing part.
The wire processing part has two wire interfaces : ISDN BRI interface connected to
OfficeServ 500 system and IEEE 802.3 Ethernet connected to LAN. The wireless
processing part has 2.4 GHz frequency bandwidth of wireless LAN, which complies
with the RF interface based on IEEE 802.11b standard.
Wired Interface Interworking with the OfficeServ 500 System
From a wired interface, the ISDN BRI interworks with OfficeServ 500 System. The
ISDN BRI service is implemented using the Digital Adapter Subscriber
Loops(DASL) chip of National Semiconductor Co., Ltd. This is not a standard ISDN
BRI chip, but Samsung uses it own protocols. Its data transmission speed is 144 Kbps
and there are two voice channels and one data channel. The wired section, which
inter-works with OfficeServ 500 System, sends and receives signaling data for voice
data transmission as well as voice communication.
Wired Interface Interworking with LAN
The wired Ethernet interface can access to LAN with the 10/100BASE-T port and
send/receive data via Internet, other than voice. The wireless processing part can
send/receive voice data for wireless voice communication, as well as data for
wireless access to Internet. The maximum data transmission speed between wireless
sections is up to 4 to 5 Mbps. One unit of WBS24(Combo) can process simultaneous
calls on 4 channels.
Wireless Interface
The wireless interface uses 2.400 to 2.4835 GHz of wireless frequency bandwidth
and meets the IEEE 802.11b standard. Voice can be sent and received across the
wireless sections using a voice-specific terminal. The Voice over WLAN
sends/receives the voice packet data, and laptop computers and PDA send/receive the
data packet across the wireless sections. 13 wireless channels are used in Korea and
11 wireless channels are used in the U.S.
The wireless interface occupies 22 MHz of bandwidth per wireless channel and the
interval between center frequencies is 5 MHz. Therefore, to be a clear channel that
does not interfere with other wireless channels, it should be 4 channels away from
other channels. The wireless processing part sends/receives voice data for wireless
voice communication, as well as data for wireless access to Internet. The maximum
data transmission speed between wireless sections is up to 4 to 5 Mbps. One unit of
WBS24(Combo) can process simultaneous calls on 4 channels.
Page 1-12
OfficeServ 500 Wireless LAN Service Manual/Ed.00
© SAMSUNG Electronics Co., Ltd.