
Restrictions
Modem over ISDN BRI for the Cisco 3640 Router 5
5Router(config-if)#encapsulation ppp Enable Point-to-Point Protocol (PPP)
encapsulation on the BRI interface. PPP
encapsulation is configured for most
ISDN communication.
If the router needs to communicate with
devices that require a different
encapsulation protocol, needs to detect
encapsulation on incoming calls
automatically, or needs to send traffic
over a Frame Relay or X.25 network,
see the Cisco IOS software document,
Dial Solutions Configuration Guide.
6Router(config-if)#dialer map
protocol
next-hop-address
name
hostname
speed 56|64
dial-string
[:
isdn-subaddress
]
Router(config-if)#dialer map
protocol
next-hop-address
name
hostname
spc [speed
56 |64] [broadcast]
dial-string
[:
isdn-subaddress
]
(Optional, Most locations) Define the
remote recipient’s protocol address,
host name, and dialing string;
optionally, provide the ISDN
subaddress; set the dialer speed to 56 or
64 kbps, as needed.
or
(Optional,Germany) Use the command
keyword that enables ISDN
semipermanent connections.
7Router(config-if)#dialer-group
group-number
(Optional) Assign the interface to a
dialer group to control access to the
interface.
8Router(config-if)#dialer-list
dialer-group
list
access-list-number
(Optional) Associate the dialer group
number with an access list number.
9Router(config-if)#access-list
access-list-number
{deny | permit}
protocol source address source-mask
destination destination-mask
(Optional) Define an access list
permitting or denying access to
specified protocols, sources, or
destinations. Permitted packets cause
the router to place a call to the
destination protocol address.
10 Router(config-if)#no ip-directed
broadcast (Optional) Disable the translation of
directed broadcast to physical
broadcasts.
11 Router(config-if)#isdn switch-type
switch-type
(Optional) Configure the interface
ISDN switch type to match the service
provider switch type. The interface
ISDN switch type overrides the global
ISDN switch type on the interface.
For a list of keywords, refer to Table 1.
12 Router(config-if)#isdn tei [first-call |
powerup](Optional) Determine when ISDN TEI
negotiation occurs for an individual
interface. This overrides the global
configuration command.
Step Command Purpose