3-11 MINI-LINK BAS
EN/LZB 111 0542 P2B Technical Description
3.5 Typical Network Applications
Due to its flexible ATM based platform and its F-DCA technology, is
a highly competitive solution for delivering services in the access
network.
Traditional telephony service can be supported by the MINI-LINK
BAS as shown in Figure 3-8. Typically, small and medium businesses
have a PBX that uses either analogue or digital lines. A digital PBX
that uses E1/T1 trunks can interface directly to the CE-SU (E1/T1) AT
interfaces. In order to support analogue telephony services, the
operator can augment the AT functionality with a Channel Bank (CB).
ATM PVC links the AT’s E1/T1 interface to a CE-SNI E1/T1
interface in the R-AAS or in a C-AAS, which in its turn is connected
to the PSTN. Note that the MINI-LINK BAS can also support an
intra-Hub port-to-port connection, depicted in Hub 1 in the diagram.
For local leased line interconnection applications this can reduce the
load on the ATM mux/switch and other associated central office
equipment.
PBX
AT
AT
AT
AT
Radio
Shelf
C-AAS
(CE Shelf)
AT
CB
AT
AT
AT
RN
RN
ATM
Radio
Shelf
CB
PSTN
HUB 1
HUB 2
CB = Channel Bank
PBX = Private Branching Exchange
AT = Access Termination
RN = Radio Node
Analog
PABX
PBX
Figure 3-8 System Deployed for Telephony (PBX-PSTN, PBX-
PBX)
An alternative solution to the conventional voice transportation is
offered by the Voice over IP (VoIP) technology. An example of how
the MINI-LINK BAS can support VoIP is shown in Figure 3-9. In
such a scenario the subscriber’s IP packets, containing telephony
information, interface with the MINI-LINK BAS through an AT’s
10BaseT interface and are then carried along with other IP services.
To support VoIP services, the operating company or subscriber must
use an external VoIP gateway.
This solution gives the subscriber and operating company the option
to select between traditional voice or datacom and VoIP services
converged according to their needs.
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