BSC Base Station Controller Cellular Network with Remote Access HS - 071403l MSC Mobile Switching Center Comm. Tower BTS Base Transceiver Station BTS Base Transceiver Station Optical Copper Optical UMA DS1/Ethernet -48 Vdc and/or +24 Vdc BTS and BSC Equipment List Cellular Radio T1 Transmission Equipment T1 DACS T1 CSU/DSU M13 Multiplexer Power Generator Batteries Optical Transmission Serial Ports SA-8000 Serial/IP Access Gateway 4,8,16 and 32 serial ports available Connection to the remote SA-8000 through the UMA T1 with Ethernet Drop and Insert There are three typical methods to connect to a remote network element. The first method is to be onsite at the remote location. The second method involves hanging a modem off of each element. This requires an analog telephone line per modem. If an IP connection is available, that provides the best  throughput. Holly Street provides Ethernet access to multiple serial and IP enabled network elements through the HS-475 T1/Ethernet Drop and Insert and the SA-8000 Serial Access Gateway. Comm. Tower Comm. Tower BTS Base Transceiver Station Microwave The SA-8000 provides, through the connection of a single modem, connectivity into multiple Serial only and IP (Ethernet) enabled network elements. This connection is in the form of a web-browser, not requiring any additional new software to learn. The additional benefit of the SA-8000 is the level of security provided using the login page and the Application specific software that only allows authorised technicians to access specific network elements. The HS-475 extends the local Ethernet LAN through a dedicated DS0 riding a T1 that connects to the remote BTS. Ethernet DS1 One DS1 used to drop Ethernet T1 T1 From MSC or BSC to BTS Ethernet over DS1 Maintenance or Field Technician Comm. Tower Drawing Title: Ref Dwg Number: This document contains proprietary information and shall not be duplicated or disclosed without the written permission of Holly Street Communications, Inc. By accepting this document the recipient agrees to make every effort to prevent unauthorized use of this information. Page of 1 1 Holly Street Communications, Inc. 5571 San Jose Drive Pleasanton, California 94566 www.hollystreetcomm.net