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MGX 8850 Installation and Configuration, Release 1.1.20
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About This Manual
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Regulatory Compliance and Safety Information for the MGX 8800 Series
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Introducing the MGX 8850 Switch
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Site Preparation
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Enclosure and Card Installation
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Configuring the MGX 8850 (PXM1) Switch
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Card and Service Configuration
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System Specifications
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Cabling Summary
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Cisco Cabinet Dimensions
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Switch Commands That Apply to the MGX 8850 Node
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PDF Copy of the Cisco MGX 8850 Installation and Configuration, Release 1.1.20
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Table Of Contents
Cabling for RJ-48 Connectors on T1 and E1 Ports
Cabling Summary
Introduction
This appendix contains details on the MGX 8850 cabling.
Note
In all cable references, the transmit direction is away from the switch, and the receive direction is towards the switch.
T3 Trunk Cabling
A trunk cable connects each T3 port on the BNC-2T3 back card to a T3 port on the co-located BPX-8600-series node. Refer to Table B-1 and Table B-2 for details.
Table B-2 T3 Connector Pin Assignments
Rx BNC
Receive T3 from trunk
Tx BNC
Transmit T3 to trunk
Frame Relay Cabling
This section describes the cabling and connector pinouts for the Frame Relay cards.
T1 Cabling
Trunk cables connect the customer DSX-1 cross-connect point or T1 Channel Service Unit (CSU) to the node at the T1 back card. Refer to Table B-3 and Table B-4 for details.
Table B-4 T1 Connector Pin Assignments
1
Transmit, Tip
2
Transmit Pair Shield
3
Receive, Tip
4
Receive Pair Shield
9
Transmit, Ring
11
Receive, Ring
Note
E1 Cabling
BNC Connector
E1 trunk cables connect the customer DSX-1 cross-connect point or E1 Channel Service Unit (CSU) to the node at the FRSM E1 back card (BNC-8E1). Refer to Table B-5 and Table B-6.
Table B-6 E1 Connector Pin Assignments (unbalanced)
Rx BNC
Receive E1 from trunk
Tx BNC
Transmit E1 to trunk
DB15 Connector
E1 trunk cables connect the customer DSX-1 cross-connect point or E1 CSU to the node at the FRSM E1 back card (DB15-8E1). Refer to Table B-7 and Table B-8.
Table B-8 E1 Connector Pin Assignments
1
Transmit, Tip
2
Transmit Pair Shield
3
Receive, Tip
4
Receive Pair Shield
9
Transmit, Ring
11
Receive, Ring
Note
12IN1-S4 V.35/X.21 Back Card
The back card for the MGX-FRSM-HS1/B is the 12IN1-S4. Each port on the back card connects through a DTE version or DCE version of the Cisco 12IN1 cable. For the signals on the back card, see Table B-10 and Table B-11. The tables show the signal acronym, signal name, and signal source. The signal depends whether the backcard connector is either DTE or DCE and whether the backcard has been set as either X.21 or V.35 as shown in Table B-9. For the part numbers of the standard and non-standard versions of the 12IN1 cables, see Table B-12.
Note
HSSI Port Connectors
The High Speed Serial Interface (HSSI) port connects through a female SCSI-II connector. This connector accords with ANSI/TIA/EIA-613. Refer to Table B-13 for the pinouts.
Cabling for RJ-48 Connectors on T1 and E1 Ports
For T1 and E1 ports that connect through a RJ-48 connector, each connector has:
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•
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An illustration of the connector wiring appears in Figure B-1.
Figure B-1 RJ-48 Connectors
DC Power Cabling
DC Power connections are made to the DC Power Entry Modules at the rear of the MGX 8850 node. (See Figure B-2.) See Table B-14 and Table B-15 for acceptable cable and wire types. Cisco normally does not provide wiring for DC-powered systems. See Table B-14 for details on DC wiring.
Figure B-2 DC Power Connections
AC Power Cabling
Either Cisco Systems or the customer can provide the AC power cord. See Table B-15 for the power cords that Cisco can supply. In addition, you can special-order AC cables with other plugs or different lengths. If you want to construct the power cord, it must mate with an IEC320 16/20A male receptacle on the back of the AC power module.
Control and Clock Cabling
This section describes the cables that can connect to the PXM-UI card.
Maintenance and Control Ports
The Maintenance (or Modem) port and the Control (or Console) port connect a node to an ASCII terminal, workstation, or modem for remote alarm reporting or system monitoring. Refer to Table B-16 for a description of the cabling and Table B-17 for the pinout of the associated RJ-48 connector.
Table B-16 Maintenance and Control Port Cabling
Interface:
EIA/TIA-232—both are DTE ports.
Suggested Cable:
24 AWG, 25-wire. A straight-through EIA/TIA-232 cable provides a terminal or printer connection. For an interface with modems on either port, a null modem cable may be necessary.
Cable Connector:
RJ-48, subminiature, male. Table B-17 contains a list of the port pin assignments.
Max. Cable Length:
50 feet (15 m)
Modem Cable
shows a modem cable that is used for connecting modems to the MGX 8850 control and maintenance ports.
Figure B-3 Null Modem Cable
External Clock Input Cabling
The external clock input cable connects the external clock inputs through the T3E3-D, T3E3-B and SMF-155 EXT. TMG. connectors. The clock may be 1.544 Mbps for T3E3-D or 2.048 Mbps for T3E3-D. See Table B-18 through Table B-21.
T1/E1 Clock Cabling
The DB15 clock port can accept a T1 or E1 BITS clock input.
Table B-18 External Clock Cabling—T3E3-D or SMF-155
Cable Type:
Western Electric 22 AWG, ABAM individually shielded twisted pair (100 ohm balanced). One pair per T1 line (1 receive).
Cable Connector:
Male DB-15 subminiature. Refer to Table B-19 for pinouts.
Max. Cable Length:
533 ft. (162 m) maximum between the MGX 8850 node and the first repeater or CSU. Selection of cable length equalizers is used. Wire build-out is required.
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Table B-19 T1 Connector Pin Assignments for EXT. TMG
1
2
Transmit Pair Shield
3
Receive, Tip
4
Receive Pair Shield
9
11
Receive, Ring
E1 Clock Cabling
Table B-21 E1 Connector Pin Assignments for EXT.TMG (unbalanced)
Rx BNC
Receive E1 from trunk
External Alarm Cabling
The external alarm cable connects to the Alarm connector on the PXM-UI card. See Table B-22 for physical characteristics of the cable and Table B-23 for the pinouts.
Table B-22 External Alarm Cabling
Interface:
Dry-contact relay closure.
Wire:
24 AWG, shielded, 6-pair.
Connector:
DB-15, Subminiature, male.
Standard MGX 8850 Cables
For a list of the standard cables that Cisco can supply for the MGX 8850 switch, see Table B-24. The suffix to the model number indicates the length of the cable. For example, 5610-50 indicates a 50-foot cable. Cables are available in standard lengths of 10 ft. (3 m), 25 ft. (7.6 m), 50 ft. (15 m), 75 ft. (22.8 m), and 100 ft. (30 m). Lengths of 100 ft. (30 m) to 600 ft. (183 m) are available through a special order.
Where applicable, Table B-24 includes the gender of the connector and the number of pins. For example, EIA/TIA-232/M25-M25 indicates a cable terminated with a male DB25 at both ends.
Redundancy Y-Cable
Special Y-cables provide line redundancy where applicable. (The Service Resource Module can also provide redundancy where certain Y-cables do not apply.) Table B-25 lists the Y-cables used with various MGX 8850 cards.
