Cisco 3945 User Manual

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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
OL-20696-04
Chapter Configuring Backup Data Lines and Remote Management
Configuring Data Line Backup and Remote Management Through the ISDN S/T Port
Configuring Data Line Backup and Remote Management
Through the ISDN S/T Port
This section contains the following topics:
• Configuring ISDN Settings, page 117
• Example, page 120
Cisco 3900 series routers can use the ISDN S/T port for remote management. Figure 2 and Figure 3
show two typical network configurations that provide remote management access and backup for the
primary WAN line.
Figure 2 shows a dial backup link that goes through a customer premises equipment (CPE) splitter, a
digital subscriber line access multiplexer (DSLAM), and a central office (CO) splitter before connecting
to the ISDN switch.
Figure 2 Data Line Backup Through CPE Splitter, DSLAM, and CO Splitter
1 Cisco 3900 series router A Primary DSL interface, FE interface (Cisco 3900
series router)
2 DSLAM B Dial backup and remote management through the
ISDN interface (ISDN S/T port); serves as a
failover link when the primary line goes down
3 ATM aggregator
4 ISDN switch
5 ISDN C Provides administrator with remote management
capability through the ISDN interface when the
primary DSL link is down; serves as dial-in access
to allow changes or updates to Cisco IOS
configuration
6 ISDN peer router
7 Web server
8 Administrator
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network
Internet
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Cisco 3945 Specifications

General

Form Factor	Rack-mountable
Maximum Throughput	75 Mbps
Product Type	Router
Connectivity Technology	Wired
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Operating System	Cisco IOS
Flash Memory	256 MB
Network/Transport Protocol	IPSec
Remote Management Protocol	SNMP
Encryption Algorithm	DES, AES
Features	Firewall, VPN, Quality of Service (QoS), VLAN support
Interfaces	2 x USB
Security Features	Intrusion Prevention System (IPS)
Operating Temperature	32 °F to 104 °F (0 °C to 40 °C)
Storage Temperature	-4 °F to 149 °F (-20 °C to 65 °C)
Humidity	10 - 85% (non-condensing)
Memory	2 GB
Expansion Slots	4 (free) x EHWIC ¦ 2 x service module ¦ 1 x ISM ¦ 1 x CompactFlash Card