Nortel DMS-100 Series Maintenance Manual page 56

2-36 Star Remote System hardware
Figure 2-15 Telephone network with 1-Meg Modem Service
PSTN
DMS
switch
Host office
xEMS
ISP
Content
The Star Hub line drawer contains the DBIC and xLCs. The Star Hub can hold
up to 18 line drawers. Each line drawer can hold one DBIC and up to 31 xLCs.
Each 1-Meg Modem Service subscriber has an xLC. Each line drawer with
xLCs must have a DBIC to provide data service. Each DBIC provides an
Ethernet connection to the transport network for all subscribers in the line
drawer.
The Star Remote Hub can support a mix of line drawers that support each
service. However, a line drawer cannot support a mix of services. A line drawer
can support either 1-Meg Modem Service with xLCs or POTS with POTS line
cards.
The Star Hub can have a maximum of 18 Ethernet connections for all its
1-Meg Modem Service subscribers. The configuration of the transport
network can require these Ethernet interfaces to connect to a mix of network
components. The flexibility of the 1-Meg Modem Service allows you to
change the interface to public and private wide area networks (WAN) to meet
297-8353-550 Standard 05.01 March 2001
Star Hub
Line
drawer
D
Host PM
B
I
C
Transport
Network
IAP
Internet
xLC
xLC
xLC
xLC
Corporate
network
1-Meg
Modem