155 Series Lims Overview - General DataComm Xedge 6000 Series Hardware Installation

Line Interface Modules

155 Series LIMs Overview

The 155 series of OC-3/STM- LIMs are intended for use with a variety
of controllers listed in
Automatic Protection Switching support single mode, multimode or
long reach single mode configurations, as described below. When APS
is off, the LIM has two working links. The APS feature can be
software configured to be active or inactive.
• The 155M-2 LIM is a dual-port, short reach, OC-3c/STM-1 LIM
with single port APS. It uses two SC fiber connectors for the link
interface. When configured for APS, the LIM has one working
link, backed up by one APS protection link.
• The 155I-2 LIM is a dual-port, intermediate reach, OC-3c/STM-1
LIM with single port APS. It uses two SC fiber connectors for the
link interface. When configured for APS, the LIM has one
working link, backed up by one APS protection link.
• The 155L-2 LIM is a dual-port, long reach, OC-3c/STM-1 LIM
with single port APS. It uses two SC fiber connectors for the link
interface. When configured for APS, the LIM has one working
link, backed up by one APS protection link.
(If loop testing, see note below.)
• The 155M-APS LIM is a dual-port, short reach, OC-3c/STM-1
LIM with dual port APS. It uses four SC fiber connectors (two
working, and two APS protection) for the link interface. When
configured for APS, the LIM has two working links, each backed
up by an APS protection link dedicated to it.
• The 155I-APS LIM is a dual-port, intermediate reach, OC-3c/
STM-1 LIM with dual port APS. It uses four SC fiber connectors
(two working, and two APS protection) for the link interface.
When configured for APS, the LIM has two working links, each
backed up by an APS protection link dedicated to it.
• The 155L-APS LIM is a dual-port, long reach, OC-3c/STM-1
LIM with dual port APS. It uses four SC fiber connectors (two
working, and two APS protection) for the link interface. When
configured for APS, the LIM has two working links, each backed
up by an APS protection link dedicated to it.
(If loop testing, see note below.)
Note
When loop testing a long-reach 155 Series LIM, the TX signal must be attenuated by 15dB. Without
attenuation, the receiver input may be overdriven.These are dual port optical LIMs with Automatic
Protections Switching include the 155M-2, 155I-2, 155L-2, 155M-APS, 155I-APS, 155L-APS
032R440-000
Issue 17
Table 1-4. These dual port optical LIMs with
Xedge 6000 Hardware
Installation & Setup Guide
155 Series LIMs Overview
155M-APS 155M-2
LINK0 (W) LINK 0
AL IS AL IS
R
X
T
X
LINK0 (P) LINK 1
AL IS AL IS
R
X
T
X
LINK1 (W)
AL IS
R
X
T
X
LINK1 (P)
AL IS
R
X
T
X
R
X
T
X
R
X
T
X
5-21