Cisco 3600 - 24 Port Digital Modem Network Module Installation Guide Page 55
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Connecting Serial Network Modules to a Network 6-3
Distance Limitations
The synchronous serial port can be configured as DTE or DCE (except EIA-530, which is
DTE only), depending on the attached cable. To order a shielded cable, contact customer
service. (See the Cisco Information Packet publication that came with your router.)
Note All serial ports configured as DTE require external clocking from a CSU/DSU or
other DCE device.
Although manufacturing your own serial cables is not recommended (because of the small
size of the pins on the DB-60 serial connector), cable pinouts are provided in the online
document Cisco Modular Access Router Cable Specifications. This document is located on
the Documentation CD-ROM that accompanied your router, and on Cisco Connection
Online.
Distance Limitations
Serial signals can travel a limited distance at any given bit rate; generally, the slower the
data rate, the greater the distance. All serial signals are subject to distance limits, beyond
which a signal degrades significantly or is completely lost.
Table 6-2 lists the recommended maximum speeds and distances for each serial interface
type; however, if you understand potential electrical problems and compensate for them,
you may get good results at speeds and distances greater than those listed. For instance, the
recommended maximum rate for V.35 is 2 Mbps, but 4 Mbps is commonly used.
Table 6-2 Serial Interace Speeds and Distances
EIA/TIA-232
Distance
EIA/TIA-449, X.21, V.35, EIA-530
Distance
Rate (bps) Feet Meters Feet Meters
2400 200 60 4100 1250
4800 100 30 2050 625
9600 50 15 1025 312
19200 25 7.6 513 156
- About This Guide 1
- Audience 2
- Organization 2
- Conventions 4
- Cisco Connection Online 6
- Ordering Documentation 7
- Overview of Cisco Network 9
- Slot Numbering 12
- DO NOT INSTALL WAN INTERFACE 13
- CARDS WITH POWER APPLIED 13
- Unit Numbering 14
- Cisco 2600 Series Routers 15
- Slot and Unit Numbering 17
- Preparing to Install Network 19
- Safety Warnings 20
- Required Tools and Equipment 22
- Installing Network Modules in 23
- Cisco Modular Routers 23
- Asynchronous network module 24
- Blank Network Module Panels 25
- WAN interface card 27
- Connecting Ethernet Network 31
- Connecting Ethernet Ports 32
- AUI Connections 33
- 10BaseT Connections 33
- Ethernet 10BaseT 34
- 10BaseT hub 34
- 10BaseT cable 34
- 1-Port Fast Ethernet Module 35
- 10/100 bTX 37
- FAST ETHERNET 37
- LEDs Enable 37
- Connecting Fast Ethernet PRI 39
- 10/100BaseT 40
- Connecting the PRI Ports 42
- CT1/PRI port (DB-15) 43
- CTRLR 1CTRLR 0 44
- CT1/PRI CSU 45
- • CE1/PRI-B Port on page 5-9 47
- • CE1/PRI-U Port on page 5-11 47
- Connectors) 48
- CE1/PRI-U Port 49
- Fast Ethernet PRI Module LEDs 50
- Connecting Serial Network 53
- Serial DTE or DCE Devices 54
- Signaling Standards Supported 54
- Distance Limitations 55
- Asynchronous Devices 56
- RJ-45 to DB-25 adapter 57
- Modem or terminal 57
- Slot 0Slot 1 Power supply 58
- 1 Cisco 3640 router only 59
- 4-Port Serial Network Module 62
- • V.35 Serial Cable Assembly 63
- • X.21 Serial Cable Assembly 63
- Serial port LEDs 65
- ASYNC 24-31 ASYNC 16-23 66
- ASYNC 8-15 66
- ASYNC 0-7 66
- Network Module 67
- LEDs shown in Table 6-7 70
- Connecting ISDN BRI Network 71
- BRI 3 BRI 2 BRI 1 BRI 0 73
- B1 B2 B1 B2 B1 B2 B1 B2 73
- BRI S/T Module LEDs 74
- BRI U ports (RJ-45) 76
- NT1 LEDs 77
- ISDN BRI LEDs 77
- BRI U Modules LEDs 78
- Connecting ISDN PRI Network 81
- CT1/PRI-U port (DB-15) 82
- CT1/PRI-U ports (DB-15) 83
- CT1/PRI Module LEDs 84
- Network Modules 85
- CT1/PRI CSU Module LEDs 87
- Table 8-2 88
- (120-ohm) Network Modules 89
- (DB-15-to-DB-15 Connectors) 91
- 1FE-1CE1-B/U 92
- CE1/PRI Module LEDs 93
- (75-ohm) Network Modules 94
- CSU with BNC connectors 95
- Connecting Voice Network 99
- Voice Network Module LEDs 101
- Connecting Digital 103
- Modem Network Modules to a 103
- Hardware Requirements 105
- Interface Numbering 106
- Figure 10-3.) 108
- Alignment holes 109
- Connector edge 109
- Removing 6-Port MICA Modules 111
- Digital Modem Module LEDs 118
- Connecting Analog Modem 119
- Network Modules to a Network 119
- 76543210 120
- 15 14 13 12 11 10 9 8 120
- Supported Network Protocols 121
- RJ-11 jack 124
- Analog modem port (RJ-11) 124
- Straight-through 124
- RJ-11 cable 124
- 76543210IN USE 125
- 15 14 13 12 11 10 9 8 IN USE 125
- Connecting ATM Network 127
- Modules to a Network 127
- RJ-45 port 128
- Enable LED 128
- ATM traffic 128
- ADSL modem 129
- RJ-45-to-RJ-45 cable 129
- ATM-25 port 129
- ATM-25 Network Module LEDs 130
- Connecting HSSI Network 131
- HSSI port LEDs 132
- HSSI port 132
- External DSU 133
- HSSI DTE cable 133
- HIGH SPEED SERIAL 133
- HSSI Network Module LEDs 134
- Connecting Compression 137
- Supported Interfaces 138
- COMPRESSION 139
- Error LED 139
- Active LED 139
- FCC Class B Compliance 141
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