FMUX04 Users Manual

Chapter 1: Introduction

1.5.9 Power supply

Voltage (AC source)

Voltage (DC range 1)

Voltage (DC range 2)

Frequency

Power consumption

100 ~ 240 VAC

18 ~ 36 VDC

36 ~ 72 VDC

47 to 63 Hz for AC power

15 VA maximum

1.5.10 Environment

Temperature 0-50 o

C / 32-122 o

F

Humidity 0 to 90% non-condensing

1.5.11 Miscellaneous

Emission compliance meets FCC part 15 Sub B (class A)

EN55022:1994/A1:1995/A2:1997,

EN61000-3-2:1995, EN61000-3-3:1995, and EN50082-1:1997

1.6 E1 Signal Structure

1.6.1 E1 link line rate

The E1 line operates at a nominal rate of 2.048Mb/s.

1.6.2 E1 link line coding

The basic E1 line signal is coded using either the Alternate Mark Inversion (AMI) or HDB3 rule. In the AMI format, "ones" are alternately transmitted as positive and negative pulses, whereas "zeros" are transmitted as a zero voltage level. AMI is not used in most 2.048Mb/s transmissions because synchronization loss occurs during long strings of data zeros.

In the HDB3 format, a string of four consecutive zeros is replaced with a substitute string of pulses containing an intentional bipolar violation. The HDB3 code substitutions provide high pulse density so that the receiving equipment is able to maintain synchronization with the received signal.

When configured for E1, the 4-CHANNEL E1 Ports support one of two E1 line codes:

The 4-CHANNEL E1 Ports support only transparent unframed format. ie. The E1 will pass through with its original framing structure completely intact.

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