Specifications

Elastic Networks 1 BitStorm 1900 Access Multiplexer
08-01101-01, Rev. 1.50 BitStorm 1900™ Installation and Maintenance Guide 1-29
WAN Interface Card Specifications
The BitStorm 1900 system supports two (2) types of WAN interfaces,
the MIU (Management Interface Unit) and the Switch Card.
MIU (Management Interface Unit)
The MIU is the recommended WAN interface for the BitStorm 1900™
Access Multiplexer. Seated next to the modem cards, the MIU pro-
cesses Ethernet traffic and manages modems. The MIU provides pow-
erful management capabilities including SNMP and the flexiblity of
mixing and matching modem cards for varied configurations.
NOTE: The MIU works only with the 260 W power supply.
The primary functions of the MIU are Ethernet Pass Thru and Modem
Management/Auto-Discovery/Auto-Provisioning. When initialized, the
MIU automatically discovers and auto-provisions modems, on its shelf,
by writing a Shelf ID for each modem card in the shelf via an out-of-
band I²C configuration channel. Thereafter, the assigned modems will
only respond to commands from the associated MIU via the in-band
Ethernet connection.
Modem parameters can also be set in the Add/Search modem links
of the Database module in Site Manager.
The MIU communicates with the Site Manager or EMS, via TCP/IP,
which extends the flexibility of remote equipment location(s) and net-
work management. Each MIU requires only one IP address (the MIU
IP address) to manage all modems within a shelf. The MIU uses the
Modex Daemon protocol to communicate directly with EtherLoop CO
and CPE modems.
An SNMP agent has been incorporated into the MIU which allows
SNMP PC programs such as Elastic Networks’ EMS 2.0 or Castle
Rock’s SNMPc to manage the MIU and Etherloop modems. The SNMP
MIBs including MIB II RFC 1213 and the Etherloop MIB are listed
in"Appendix C: SNMP MIBs‚" on page 163 of this document, and are
available from Elastic Network’s Customer Satisfaction organization.
Refer to Table 4-1, “Customer Satisfaction Contact Information,” on
page 131.