Cisco MGX 8850 User manual

CHAPTER
2-1
Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
2
Module and Service Descriptions
This chapter includes detailed descriptions of the modules, cards and services available with the
MGX 8850:
•Processor Switching Module, page 2-1
•Service Resource Module, page 2-12
•ATM UNI Service Module (AUSM), page 2-15
•Frame Relay Service Modules, page 2-20
•Circuit Emulation Service Modules, page 2-45
•Voice Service—VISM, page 2-55
Processor Switching Module
The PXM1 card set consists of the PXM1 front card, the PXM1 User Interface back card (PXM1-UI or
PXM-UI-S3), and various uplink back cards that can serve as either a trunk or a UNI.
For physical details of PXM1 cards, see Appendix A, “System Specifications.”
Caution Handle the PXM1 front card very carefully to preserve the alignment of the attached disk drive. Do
not drop or bump the PXM1.
Caution Before using the MGX 8850, verify that the daughter card on the PXM1 corresponds to the uplink
card type. Serious damage may result if the power is on and these cards are mismatched.
Note If you accidentally insert a back card for a service module into slot 7, 8, 23, or 24, carefully remove
the back card and check for bent or damaged pins on the backplane and the back card.

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
PXM1 Features
The PXM1 (see Figure 2-1) is a combination ATM switching fabric, data processing, and ATM interface
card. This module combines a 1.2 Gbps shared-memory switching fabric with integrated trunking at
speeds up to OC-12. The switching fabric provides 1.2 Gbps of non-blocking switching capacity, while
the processor provides the control plane that delivers IP+ATM networking software, diagnostics, and
performance monitoring.
The PXM provides integrated switching, processing, and broadband interfaces to provide the following
high-performance switching and trunking features:
•1.2-Gbps non-blocking switching
•Integrated T3/E3, OC-3c/STM-1, OC-12c/STM-16
•ATM trunking
•Linear Automatic Protection Switching for the SONET interfaces.
Note APS is available only for the “B” models of the OC-3 and OC-12 uplink cards.
•Hot card insertion/removal
•1:1 hot standby redundancy
•User-selectable primary and secondary clock sources with graceful switchover
•Internal Stratum-4 or optional Stratum-3, external BITS, or inband clock sources
•Inband management or out-of-band via EIA/TIA-232 or 10BaseT control ports
•Narrowband service modules
•Broadband trunking support
•DSO to OC-12c/STM-4 interfaces supported
PXM1 Illustration and LED Description
PXM1 provides connectors for external audio and visual alarms. The interface can either be always open
or always closed. Major and minor alarms are controlled separately. An alarm cutoff button is accessible
from the front. A history LED is set when the alarm cutoff button is pressed. The history LED can be
cleared by pressing the history clear button on the faceplate.
The PXM1 provides the following indicators:
•System Status Active/Standby/Fail/standby update (green/yellow/red/flashing yellow)
•Critical alarm (blue)
•Major alarm (red)
•Minor alarm (yellow)
•DC OK A (green = OK, red = not OK)
•DC OK B (green = OK, red = not OK)
•ACO (green)
•History (green)

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
•Port Activity Active and Clear/Remote alarm/ Local alarm (green/yellow/ red)
•LAN activity (flashing green)
Figure 2-1 PXM1 Front Card
PXM1 User Interface Back Cards
The PXM1 User Interface (PXM1-UI) back card provides ports for communication and control. This
card is also used to connect the system to an external clocking source. Install this card in the upper half
of the back of the PXM1. See the “User Interface Access Ports” section on page 5-2 for more information
on the PXM1 back card ports.
There are two options for the PXM1 User Interface back card:
11439

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
1. PXM1-UI (standard)
The PXM1-UI back card shown in Figure 2-2 provides
•One RJ-45/48 for external T1 or E1 clock input
•One BNC connector for E1 clock input
•One DB-15 female connector for alarm interface
•Maintenance, control and LAN ports.
2. PXM-UI-S3 (optional)
The PXM-UI-S3 back card shown in Figure 2-3 provides Stratum-3 clocking:
•One RJ-45/48 connector for external T1 or E1 clock input (CLK1).
•One DB-15 female connector for alarm interface (Alarm).
•Maintenance, control and LAN ports.
Note The LAN2 and CLK2 ports on the PXM-UI-S3 are not supported in this release. All external
connections are made with the LAN1 and CLK1 ports.
Making External Clock Connections
If external equipment or a local digital central office is to provide synchronization, the external clock
source is connected to the PXM1-UI or PXM-UI-S3 back card.
Stratum-4 clocking
External clocking sources are connected to the PXM1-UI back card (see Figure 2-2).
•One RJ-45/48 connector for external T1 or E1 clock input.
•One BNC connector for E1 clock input.
Stratum-3 clocking
External clocking sources are connected to the PXM-UI-S3 back card (see Figure 2-3).
For T1 and E1 Stratum-3 external clock input, connect the source to the RJ-45/48 connector labeled
“CLK1.”
Note The LAN2 and CLK2 ports on the PXM-UI-S3 are NOT supported in this release. All external
connections are made with the LAN1 and CLK1 ports.
See Chapter 5, “Configuring the MGX 8850 Shelf” for information on configuring an external clocking
source.

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
PXM1 Back Card Illustrations
This section contains illustrations of the following PXM1 cards:
•Figure 2-1: PXM1 Front Card
•Figure 2-2: User Interface Back Card (PXM1-UI)
•Figure 2-3: User Interface Back Card (PXM-UI-S3): Stratum-3 Clocking
•Figure 2-4: OC-12 Long-Reach Back Card (SMFLR-1-622/B)
•Figure 2-5: OC-12 Intermediate-Reach Back Card (SMFIR-1-622/B)
•Figure 2-6: OC-3 Four-Port Back Card (SMF-155/B)
•Figure 2-7: Two-port T3 Back Card (BNC-2T3)
•Figure 2-8: Two-port E3 Back Card (BNC-2E3)
PXM1 User Interface Back Cards
See the “PXM1 User Interface Back Cards” section on page 2-3 for descriptions of the features available
with the PXM1 User Interface back cards.
Figure 2-2 User Interface Back Card (PXM1-UI)
57659
PXM1-UI
C
P
M
P
C
L
O
C
K
T1
L
A
N
A
L
A
R
M
E1 CLOCK
T1 clock
Maintenance port
Control port
LAN port
E1 clock source
Alarm outputs

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
Figure 2-3 User Interface Back Card (PXM-UI-S3): Stratum-3 Clocking
Alarm Output Connection
Dry contact relay closures are available for forwarding MGX 8850 alarms to an alarm system. Separate
visual and audible alarm outputs are available for major and minor alarm outputs. The MGX 8850 alarm
outputs are available on a DB-15 connector on the PXM-UI-S3 back card faceplate. See Appendix B,
“Cabling Summary,” for the pinouts on this connector. Use the switchboard cable for running these
connections.
PXM
UI-S3
C
P
M
P
A
L
1
N
L
2
N
A
EXT CLK 1
L
A
A
R
M
46010
EXT CLK 2
External Clock 1
(connection for T1 and E1
external clock sources)
LAN 2 port
(not supported in this release)
LAN 1 port
Maintenance port
Control port
External Clock 2
(not supported in this release)
Alarm port

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
SMFLR-1-622 Back Card
An illustration of the long-reach OC-12 card appears in Figure 2-4. For specifications on this card, see
Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”
model—an SMFLR-1-622/B.
Figure 2-4 OC-12 Long-Reach Back Card (SMFLR-1-622/B)
12210
SMFLR-1-622
ENABLED
SIGNAL
RX
TX

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
SMFIR-1-622 Back Card
The intermediate-reach OC-12 back card appears in Figure 2-5. For specifications on this card, refer to
Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”
model—an SMFIR-1-622/B.
Figure 2-5 OC-12 Intermediate-Reach Back Card (SMFIR-1-622/B)
66964
SMFIR-1-622
ENABLED
SIGNAL
RX
TX

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
SMF-155 Back Card
The SMF-155 back card provides a physical single-mode fiber optic SONET OC-3 interface that
conforms to ANSI T1.105 and GR-253-CORE standards. This interface uses SC connectors, and
redundant configurations are supported through Y-cables. For specifications on this card, see
Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”
model—an SMF-155/B.
Figure 2-6 OC-3 Four-Port Back Card (SMF-155/B)
12206
ENABLED
SC-4-155
SIGNAL
RX
TX
P
O
R
T
1
SIGNAL
RX
TX
P
O
R
T
2
SIGNAL
RX
TX
P
O
R
T
3
SIGNAL
RX
TX
P
O
R
T
4

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Cisco MGX 8850 Multiservice Switch Installation and Configuration
Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005
Chapter 2 Module and Service Descriptions
Processor Switching Module
BNC-2T3 Back Card
The BNC-2T3 back card provides two T3 ports.
For card specifications, refer to Appendix A, “System Specifications.”
Figure 2-7 Two-port T3 Back Card (BNC-2T3)
12209
BNC-2T3
SIGNAL
RX
TX
PORT 1
SIGNAL
RX
TX
PORT 2