Switch User's Guide

About the CSX400
6 CSX400 and CSX400-DC User’s Guide
• The WPIM-Sync provides a synchronous serial connection of up to 2.048 Mbps to external
communications equipment (e.g., a multiplexer or CSU/DSU). The WPIM-Sync uses a
subminiature 26-pin connector that supports the electrical signal interfaces listed below.
Appendix B, provides complete part number and cable pinout information for the following
electrical signal interfaces:
• EIA-RS449
• V.35
• EIA-RS232D
• X.21
• EIA-RS530
• EIA-530A
• RS530 ALT A
• RS530A ALT A
• The WPIM-DDS provides a 56 Kbps or 64 Kbps Digital Data Service (DDS) connection. The
WPIM-DDS supports remote CSU diagnostic or 64 Kbps clear channel loopback and
non-latching remote DSU diagnostic loopback.
• The WPIM-E1 provides an E1 interface through a front panel RJ45 port and includes a built-in
CSU/DSU for direct connection to an E1 line. The WPIM-E1 provides both Full E1 or
Fractional E1 using 56 or 64 Kbps Time Slots with a total throughput of up to 2 Mbps.
• The WPIM-DI provides a T1 interface through a front panel RJ45 port and includes a built-in
CSU/DSU for direct connection to a T1 line. The WPIM-DI provides both Full T1 or Fractional
T1 using 56 or 64 Kbps Time Slots and also provides a second Drop-and-Insert interface, which
allows more than one device, such as a PBX, to share a single T1 connection.
• The WPIM-S/T provides an Integrated Services Digital Network (ISDN) 128 Kbps Basic Rate
Interface (BRI) for the CSX400. The WPIM-S/T provides an ISDN back-up link for a remote
site or branch office when the main WPIM for a frame relay or leased line loses a connection
or becomes disabled. An NT-1 adapter is necessary for this interface in the United States.
• The WPIM-HDSL provides a connection for users in a campus environment, or have access to
local subscriber loops, who want to send their data over their existing telephone lines, that may
run between floors, buildings, or other physical structures, at rates of up to 1.544Mbps. HDSL
supports line lengths of up to 3, 657 meters (12,000 feet) over 24 American Wire Gauge (AWG)
Unshielded Twisted Pair (UTP) cabling.