Nortel DMS-100 Series Maintenance Manual page 48

1-32 Maintenance overview
xLC in 1-Meg Modem Service
DBIC
The 1-Meg Modem Service supports three types of xLCs. Each xLC
supports different transmission rates and LCM drawer fill requirements.
The following table lists the xLCs supported by the 1-Meg Modem Service.
Types of xLCs in 1-Meg Modem Service
PEC
NTEX17AA
NTEX17BA
NTEX17CA
NTEX17DA
An LCM line drawer can contain a mix of POTS line cards and different
types of xLCs. However, thermal constraints and power distribution
determine the location and maximum number of each type of card. Refer to
1-Meg Modem Service Network Implementation Guide, 297-8063-200, for
more information.
Data-enhanced bus interface card The DBIC replaces the existing BIC in
each LCM drawer with an xLC. The DBIC separates the voice and data
traffic. The card multiplexes the voice traffic to standard DS-30A interfaces
to the existing circuit switched voice network. The card multiplexes the data
traffic to one 10BaseT Ethernet connection to the transport network.
The DBIC has the following features:
297–8351–550 Standard 04.01 August 1999
XLBUS
Maximum
US/DS rates
(kbit/s)
960/120
1280/320
1280/320
1280/320
half duplex, standard compliant 10BaseT interface
auto-sensing feature allows DBIC to connect at 10BaseT or 100BaseT
maximum of 31 xLCs in a drawer
connected to all line card slots through XLBUS
Twisted pair
xLC
Maximum LCM
drawer fill
16
16
31
31
1-Meg Modem
PMs
All
All
All
RLCM
Star Remote Hub