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 DA-91I
Two Port Asynchronous Data Polling Channel Module
DESCRIPTION
The RFL DA-91I is an Asynchronous Data Polling Channel Module designed for use in RFL IMUX
2000 multiplexers. It provides one or two full duplex channels between an unlimited number of
locations using a single 64 kbps DS0 time slot. The DA-91I is ideal for interconnecting remotely
located DTE equipment that can respond to data polling. It constantly monitors data from one or both
directions of the T1 or E1 bus in either a drop and insert or terminal shelf application. Transmission is
activated upon the reception of an RTS (Request to Send) from the DTE equipment. The transmission
rate for single channel operation is up to 9.6 kbps (up to 19.2 kbps with 35% jitter). The transmission
rate for dual channel operation is up to 4.8 kbps for each channel. This module is used in applications
that require multiple DA-91I cards on the same time slot, and within the same multiplexer chassis. The
DA-91I requires the use of an MA-402I Module Adapter, which provides two RS-232 interface ports.
The DA-91I automatically detects if the system is T1 or E1 and configures itself appropriately.
The DA-91I is remote-controllable when installed in an RFL remote controllable shelf. The following
module parameters can be configured remotely via the SCB or locally via DIP switches. A DIP switch
setting will control whether the card is in remote or local mode.
o TX/RX Time Slot 1-32
o TX Bus Direction TX-A(RX-B) / TX-B(RX-A)
o Service enable/disable ON/OFF
o Local Loopback ON/OFF
o Remote Loopback ON/OFF
o Signaling (CAS) ON/OFF
o CTS1/CTS2 (clear to send CH1/CH2) ON/OFF
o 7 bit (using extra bit to sample data) ON/OFF
o Mode Single/Dual
o Time Slot Sharing (see note on next page) ON/OFF
RFL DA-91I RFL Electronics Inc.
March 6, 2002 1 (973) 334-3100
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