Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
RFL Electronics Inc.
I N S T R U C T I O N D A T A
RFL DS-562I Synchronous Data Module
(RS-449, CCITT V.35, G.703, X.21
or Short Haul Optical Fiber Interface)
For RFL IMUX 2000 Intelligent T1/E1 Multiplexers
DESCRIPTION
The RFL DS-562I Synchronous Data Module provides RFL IMUX 2000 T1/E1 Multiplexers with
synchronous full-duplex data communications at either 56 Kbps or 64 Kbps. The RFL DS-562I
operates in terminal or drop and insert systems over T1/E1 carrier lines and uses RS-449/422, CCITT
V.35, G.703, X.21/V.11, or short haul optical fiber interfaces. The RFL DS-562I communicates with
older RFL DS-562B modules and occupies only one shelf location.
This module communicates using a single bi-directional time slot. When communicating at 56 Kbps
the communication protocol includes provisions for programmable addressing to prevent DS0
misconnections. One of 63 addresses is selectable locally using DIP switches or remotely using
software. LEDs indicate when the addressing feature is enabled, and when the DS-562I has
established valid communications with the appropriate DS-562I. As an option the received data may
be squelched during loss of valid address. This option can be selected locally using DIP switches or
remotely using software.
When using an RS-449 interface, the RFL DS-562I allows the selection of local loopback or remote
loopback functions. Local equipment loopback takes the data coming in on the 56/64 Kbps I/O port
and sends it back out on the same I/O port. Local payload loopback (also called “remote loopback”)
echoes the T1/E1 data back to the source. The loopbacks may be enabled remotely via software or
locally by either a front accessible toggle switch, or when using the RS-449 interface, via pins on the
rear panel connector. The local loopback commands will override any remote (software) loopback
commands. The board contains two LEDs to indicate when either type is enabled.
The RFL DS-562I may be operated as a DCE or DTE. In DTE mode the connected equipment
supplies the transmit clock. The externally supplied clock must be synchronous with the T1/E1 carrier.
The card supports data, clock, RTS, and CTS signals at the user connector. The CTS is normally a
copy of the RTS signal, but as an option can be delayed by approximately 8 microseconds.
NOTE
Channel addressing cannot be used on G.703 interfaces since G.703 only operates at 64 Kbps.
RFL DS-562I RFL Electronics Inc.
June 14, 2007 1 (973) 334-3100
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