Contents

CONTENTS
1.0	Warranty Information	3
1.1	Radio and TV Interference	3
1.2	CE Notice	3
1.3	Service	4
2.0	General Information	5
2.1	Features	5
2.2	Description	5
3.0	Installation	7
3.1	Connecting the Twisted-Pair Line Interface	7
3.2	Connecting 10Base-T Ethernet Port to PC (DTE)	8
3.3	Connecting 10Base-T Ethernet Port to Hub (DCE)	8
3.4	Connecting Power	9
3.5	Power Input Connector	9
	External AC universal power supply	9
	External 48 VDC power supply	10
4.0	Operation	11
4.1	Front Panel LED Status Monitors	11
4.2	Test Modes	13
	Remote Digital Loopback (RDL)/V.52 (BER)	13
A	Specifications	14
A.1	General Characteristics	14
A.2	WAN Characteristics	14
A.3	Ethernet	14
A.4	Distance	14
A.5	Diagnostics	14
A.6	LED Status Indicators	14
A.7	Connectors	15
A.8	Power Supply	15
A.9	Temperature Range	15
A.10 Altitude		15
A.11 Humidity		15
A.12 Dimensions		15
A.13 Weight		15
B	Models 2155 Factory
	Replacement Parts and Accessories	16
C	Models 2155 Interface Pin Assignment	17
C.1	10Base-T Interface	17
	RJ-45	17
C.2	CopperLink Interface	17
	RJ-45	17