BSS Description B10 (3FL10473A-ed 2)
BSS Description B10 (3FL10473A-ed 2)
BSS Description B10 (3FL10473A-ed 2)
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1. Evolium <strong>BSS</strong> Introduction<br />
Architecture<br />
ALCATEL <strong>BSS</strong> <strong>Description</strong> 26<br />
Interfaces in the <strong>BSS</strong><br />
Abis<br />
Ater Mux / A<br />
Gb<br />
EVOLIUM<br />
ALCATEL <strong>BSS</strong> <strong>Description</strong><br />
The <strong>BSS</strong> interfaces are:<br />
• The A-ter mux interface is us<strong>ed</strong> to connect:<br />
• BSC to TC and/or MFS<br />
• MFS to TC.<br />
All Rights Reserv<strong>ed</strong> © Alcatel-Lucent 2008<br />
• The “A” interface is us<strong>ed</strong> to connect TC to MSC.<br />
• The A-ter interface is an internal interface to BSC and TC.<br />
• The A-bis interface is us<strong>ed</strong> to connect BTSs to BSC.<br />
• The Gb interface is us<strong>ed</strong> to connect MFS to SGSN (directly or through TC and MSC)-(Note: interface<br />
MSC-SGSN is call<strong>ed</strong> Gs).<br />
All these interfaces are carri<strong>ed</strong> over standard 2Mbps PCM links of 32 TS, 64Kbps each.<br />
As an option, the A-ter mux and A interfaces in the TC can be carri<strong>ed</strong> over an optical STM1 interface<br />
(1 STM-1 can carry up to 63 E1 interfaces), which can be then rout<strong>ed</strong> over the SDH network, offering<br />
improv<strong>ed</strong> transmission efficiency.<br />
Also as an option, the Gb interface can be carri<strong>ed</strong> over IP, offering easier routing and lower costs.<br />
Other interfaces in this diagram:<br />
Interface Gi between GGSN and Internet<br />
Interface Gn between SGSN and GGSN<br />
All Rights Reserv<strong>ed</strong> © 2007, Alcatel-Lucent<br />
<strong>3FL10473A</strong>DAAWBZZA Edition 02<br />
EVOLIUM ALCATEL <strong>BSS</strong> <strong>Description</strong> Page 26
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