Nortel DMS-100 Series Maintenance Manual page 59

The NTEX17DA supports a transmission rate of 1280 kbit/s downstream and
320 kbit/s upstream. Up to 31 xLC cards can be provided in a line drawer.
Refer to 1-Meg Modem Service Network Implementation Guide,
297-8063-200, for information on drawer fill.
NTEX54CA 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:
• 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
• backwards compatible with all POTS line cards compatible with the
NT6X54AA
• different media access control (MAC) addresses for each xLC and DBIC
• demultiplex 64 voice channels from receive data (RD) links to XLBUS
links
• multiplex 64 voice channels from XLBUS links to transmit data (TD) links
• +12.7v CODEC reference to all 64 line positions
• controls ring bus and automatic number ID (ANI)/COIN voltages using
relays
Any line drawer that contains xLCs must have a DBIC. The following figure
illustrates the DBIC in the 1-Meg Modem Service.
DMS-100 Family NA100 Star Remote System XPM15 and up
Star Remote System hardware 2-39