User Manual

BETA DRAFT —CISCO CONFIDENTIAL
3G Wireless High-Speed WAN Interface Card for Cisco 1800, 2800, and 3800 Series Routers
How to Configure the Wireless WAN HWIC
6
Cisco IOS Release TBD
Activating a GSM Account
The GSM WAN HWIC is equipped with a SIM card slot. The card is pre-provisioned and is available
with cellular account-specific information. You must subscribe to a GSM service from a carrier to obtain
this card.
Configuring DDR
To configure DDR on the interface, perform the steps in this section. This section contains the following
subsections:
• Dial-on-Demand Routing
• SUMMARY STEPS
• DETAILED STEPS
Dial-on-Demand Routing
Dial-On-Demand Routing (DDR) is a technique whereby a router can automatically initiate and close a
circuit-switched session as transmitting stations demand. The router spoofs keepalives so that end
stations treat the session as active. DDR permits routing over ISDN or telephone lines using an external
ISDN terminal adaptor or modem.
DDR addresses the need for intermittent network connections over circuit-switched WANs.
SUMMARY STEPS
1. interface cellular dialer in-band
2. chat-script ”ATDT*99#” interface cellular dialer-string
3. dialer-list protocol permit
4. ip access-list permit
5. show cellular dialer-group
DETAILED STEPS
Command or Action Purpose
Step 1
interface cellular< slot/wic_slot/port >dialer in-band
Enables DDR on the interface.
Step 2
chat-script <carrier string name >””ATDT*99#” interface
cellular
<slot/wic_slot/port> dialer-string< carrier
string name
>
Defines chat-script for the dialer interface.
Step 3
dialer-list <dialer-group> protocol <protocol-name>
{permit | deny | list <access-list-number> |
access-group}>
Creates dialer list for interesting traffic and permits
access to an entire protocol.
Step 4
ip access-list <access list number >permit <ip source
address
>
Defines interesting traffic.
Step 5
show cellular< slot/wic_slot/port > dialer-group <dialer
group number>
Maps dialer list to the dialer interface.