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• Chapter 11, “Safety Warnings” includes several safety warnings about working with the Rear
Transition Module.
1.1Acronyms and Terms
Table 1. Acronyms and Terms (Sheet 1 of 2)
TermDefinition
AdvancedTCA* Advanced Telecommunications Computing Architecture
Blade, Board
CPUCentral Processing Unit. A microprocessor.
DPMDefects Per Million
ENAEnable
FITFailures In Time
FRU
HAHighly Available.
These terms are used interchangeably to refer to an assembled PCB card that plugs into a
chassis slot.
Field Replaceable Unit. Logically represents an entity that can be queried for sensor data,
and perhaps an entity that has a satellite management controller. Example FRUs can
include an entire SBC or a power supply.
Intel NetStructure® MPRTM0020 Technical Product Specification – April 20067
Document Organization
Table 1. Acronyms and Terms (Sheet 2 of 2)
TermDefinition
Hot SwapA specific specification from the PICMG 3.0 Spec.
2
CA two-wire serial bus. Licensed by Phillips Semiconductors.
I
®
IA-3232-bit Intel
I/OInput/Output
IPMB
Intelligent Platform Management Bus. The bus that interconnects all boards in the chassis
to the Shelf Manager.
Intelligent Platform Management Bus Channel 0 as defined in the IPMI v1.5 specification.
IPMB-0
This is the logical aggregation of IPMB-A and IPMB-B. The use of IPMB Channels 1 through
7 are not defined in this specification.
IPMB-R
IPMC
IPMI
Local IPMI link that is on the “carrier” side of the IPMC device. The IPMC shall proxy for all
IPMB-R devices (AMCs and RTM).
Intelligent Platform Management Controller. The portion of a FRU that interfaces to the
AdvancedTCA* IPMB-0 and represents that FRU and any device subsidiary to it.
Intelligent Platform Management Interface. The overall specification for doing point-to-point
management communication within the chassis over and I
JBODJust a Bunch of Drives
Node SlotAny standard slot other than a fabric slot
OOSOut of Service
PCI
Peripheral Component Interconnect. Bus technology used to interconnect components in a
computer.
PICMGPCI Industrial Computer Manufacturers Group
PMCPCI Mezzanine Card
Power ModuleEither a power supply or a power entry module
RMCRTM Management Controller. The IPMI controller on an RTM, similar to an MMC.
RMCPRemote Management Control Protocol. Defined by IPMI 1.5.
RMD
RTM Management Device. A non-intelligent device (typically an ADM1026) that
communicates over I
RTMRear Transition Module
SASSerial Attached SCSI
SDR
Sensor Data Record. An IPMI term. Used to describe the name, meaning, and units of
measure for a particular data value provided by a PM or BMC.
SELSensor Event Log. An IPMI defined term. Maintained by the BMC.
ShelfA shelf is equivalent to a chassis.
A pluggable board that provides management functions, allowing the chassis backplane to
remain passive. Although the term implies a dedicated module, the Shelf Manager may be
Shelf Manager
one function of a multi-function module. For example, the Shelf Manager and a switch can
be combined in a single physical module. The Shelf Manager performs the BMC function
within the chassis and provides remote management capabilities.
SMBus
SMC
A two-wire serial bus with slightly different electrical and timing characteristics than I
technology is owned by Intel Corporation.
Satellite Management Controller. Defined by IPMI. Also known as a peripheral controller or
C to the Front Board IPMC, rather than using IPMB like an RMC does.
2
C bus.
2
C. This
8Intel NetStructure® MPRTM0020 Technical Product Specification – April 2006
Functional Overview
Functional Overview2
Rear Transition Modules (RTM) are important components in many telecommunications and
embedded systems. These environments place most of the active components on a Front Board and
most of the cable connections (especially copper cables) are made from the RTM. This allows the
Front Board to be replaced without the need to reinsert a large number of cables in the correct
order.
In AdvancedTCA* systems, the Front Board mates directly with the RTM, as shown in Figure 1:
Figure 1. Relationship of RTM to Front Board
Front Board
The Intel NetStructure
with the Intel NetStructure MPCBL0020 Single Board Computer.
The MPRTM0020 RTM includes the following interfaces and features:
®
MPRTM0020 Rear Transition Module is designed specificall y to work
• One serial port
• One USB 1.1 port
• T wo Gigabit Ethernet (RJ45) ports from the Fabric Interface
RTM
Intel NetStructure® MPRTM0020 Technical Product Specification – April 20069
Functional Overview
• One SAS x4 connector to support external SAS JBOD. (Only three of these SAS ports on the
RTM are usable; the first SAS port is used by the MPCBL0020 Single Board Computer’ s local
SAS drive.)
• Six T1/E1 ports with transformer and protection circuitry (designed primarily for intra-
building applications)
2
• I
• OOS and Health LEDs
• Hot Swap status LED. This LED mirrors the indication of the HS status LED on the
MPCBL0020 Single Board Computer since the MPRTM0020 RTM itself is not hot swappable.
• P30 power connector
• P31, P32, and P33 HM- ZD connectors for SBC signals
• On-board power conversion from +12V supplied by the SBC via P30 connector
• ADM1026 for voltage monitoring, storing FRU and SDR data.
C connectivity to the SBC for remote management capabilities
10Intel NetStructure® MPRTM0020 Technical Product Specification – April 2006
Operating the Unit
Operating the Unit3
3.1Introduction
The Intel NetStructure® MPRTM0020 Rear Transition Module is a non-intell igen t RTM. A nonintelligent FRU does not have a remote management controller (RMC) on board to communicate
with the SBC IPMC. Instead, all of the non-intelligent RTM sensors and FRU device information is
made available to the IPMC through direct device access. This is usually done via dummy I
sensor and storage devices. It is the responsibility of the IPMC to make the non-intelligent RTM
look like a separate intelligent FRU controller to the rest of the system.
3.2RTM Installation Procedure
The MPRTM0020 RTM is mechanically compliant with the PICMG*3.0 specifications Revision 2
ECN1.
2
C
The RTM must be installed in an AdvancedTCA* chassis prior to installing the MPCBL0020
Single Board Computer.
Install the RTM as follows:
1. Remove the rear air management blade from an AdvancedTCA chassis (where applicable).
2. Locate the slot where the RTM is to be installed in the chassis. The RTM must be installed in
the same slot number as the MPCBL0020 Single Board Computer.
3. Open the top and bottom ejector latches and slide the RTM into the chassis by aligning to the
guide rails on the top and bottom of the chassis cage.
4. Ensure that the RTM is fully installed in the chassis by locking the top and bottom ejector
handles.
5. Tighten the faceplate retention screws on the top and bottom of the RTM faceplate. Ensure that
the screws are torqued to ~6 in-lbs using a torque screwdriver.
3.3RTM Removal Procedure
Removal of the RTM from the chassis uses the following procedure:
1. Because the MPRTM0020 is not an intelligent RTM, removing the RTM causes the SBC to be
shut down. Ensure that the SBC is ready to be shut down before opening the bottom ejector
handle of the RTM.
2. Remove all interface cables from the RTM faceplate connectors.
3. Loosen the RTM faceplate retention screws with a screwdriver.
4. Open the top and bottom ejector handles on the RTM.
5. Remove the RTM from the chassis slot.
Intel NetStructure® MPRTM0020 Technical Product Specification – April 200611
Operating the Unit
3.4Digital Ground to Chassis Ground Connection
Digital ground can be tied to chassis ground through a jumper (P2) located near the bottom, right
corner of the RTM.
In the default grounding for the MPRTM0020, digital ground is isolated from chassis ground
(jumper link connecting “NC” to “GND”) as shown in Figure 2.
Figure 2. Default Grounding on MPRTM0020
T o connect the digital ground to the chassis ground, follow this procedure:
1. Remove the jumper link from the default location on P2 (connecting “NC” & “GND”).
2. Place the jumper link over pins 2 & 3 to connect “GND” to “EGND” as shown in Figure 3.
12Intel NetStructure® MPRTM0020 Technical Product Specification – April 2006
Figure 3. Digital Ground Connected to Chassis Ground
Operating the Unit
Note: Digital ground is also called “logic ground”. Chassis ground is also known as “shelf ground”.
Intel NetStructure® MPRTM0020 Technical Product Specification – April 200613
Module Components
Module Components4
4.1Block Diagram
Figure 4 shows a functional block diagram of the RTM.
Figure 4. RTM Functional Block Diagram
P30
P31
P32
P33
Backplane
Power
IPMB/I2C
ADM1026
RMD
Redriver
2xT1/E1
From Mezz. #1
2xT1/E1
From Mezz. #2
SAS
(x3)
2xGbE
(from
Fabric
Interface)
USB
Serial
Transformers / Sidactors
3 SAS
Port
RJ-45 GbE
Port
RJ-45 GbE
Port
USB Port
RJ-45 Serial
Port
1x6
RJ-48C
T1/E1
Ports
2xT1/E1
From Mezz. #3
Rear Panel
14Intel NetStructure® MPRTM0020 Technical Product Specification – April 2006
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