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CHAPTER
Network Interface (Trunk) Cards 4-1
4
Network Interface (Trunk) Cards
This chapter contains a description of the BPX switch network interface (trunk) cards, including the
Broadband Network Interface (BNI) and associated backcards. The BXM cards are briefly described
in this chapter and covered in full in a later chapter.
This chapter contains the following:
• BPX Switch Network Interface Group
• BXM Cards, Trunk Mode Summary
• Broadband Network Interface Cards (BNI-T3 and BNI-E3)
• T3 and E3 Line Modules (LM-3T3 and LM-3E3)
• Broadband Network Interface Cards, BNI-155
• OC3, Line Modules (SMF, SMFLR, & MMF)
• Y-Cabling of BNI Backcard, SMF-2-BC9
BPX Switch Network Interface Group
The BPX switch network interface group of cards provides the interface between the BPX switch
and the ATM network (see Figure 4-1). The BNI series of cards (DS3, E3, and OC3) are described
in this chapter. The BXM card trunk operation is briefly described in this chapter with additional
information provided in a later chapter. The BXM cards may be configured for either trunk or service
(port UNI) mode. In trunk mode they provide BPX switch network interfaces.
BXM Cards, Trunk Mode Summary
The BXM card sets supports T3/E33, OC-3/STM-1 or OC-12/STM-4 interfaces, and provide the
capacity to meet the needs of emerging bandwidth driven applications. The BXM cards provide high
speed ATM connectivity, flexibility, and scalability. The card sets are comprised of a front card that
provides the processing, management, and switching of ATM traffic and a back card that provides
the physical interface for the card set.
A BXM port may be configured to operate as either a trunk or UNI port. The BXM OC-12 back cards
support either Single Mode Fiber (SMF) or Single Mode Fiber Long Reach (SMFLR). The BXM
OC-3 back cards support either Multi-Mode Fiber (MMF), Single Mode Fiber (SMF), or Single
Mode Fiber Long Reach (SMFLR). The BXM-T3/E3 supports T3 1.544 Mbps and E3 34.368 Mbps
interfaces.
For a further description of the BXM cards refer to Chapter 6, BXM T3/E3, 155, and 622.