Differences Between 833IS and Cisco Products
288 Perle 833IS User Guide
The startup configuration is a text file stored on the nvram volume on the 833IS.
Similar to Cisco products, the “startup-config” is applied upon bootup of the unit.
Downloading configuration files using the 833IS Manager will update the “startup-
config” file but requires the user to reboot the unit for the configuration changes to
be applied. However, through a Telnet session, any dynamic changes to the
configuration are stored in the run-time configuration or “running-config” and most
modifications take effect immediately. In order to save these new configuration
parameters for bootup, the file must be saved to the “startup-config” file.
The 833IS can hold up to two Feature cards. The card in Slot 1 is called the System
card and the card in Slot 2 is called the Expansion card. The system card is the main
processing card and must be present in the 833IS in Slot 1 but the Expansion card is
optional.
The 833IS has a maximum of 8 BRI lines with 4 BRI lines on the System card and
optionally another 4 BRI lines on the Expansion card. Each of these interfaces are
mapped to a specific number. The interface mapping is 0 based, from 0 to 7, with 0
being the first interface on the System card and 4 being the first interface on the
Expansion Card in Slot 2.
The Interface dialer condenses the configuration process and applies common
configuration parameters to all BRI interfaces. The 833IS’s group-asynchronous
interface also applies generic configuration parameters as a single entity to all
asynchronous interfaces. This method is used instead of individual configuration for
each asynchronous interface on the 833IS.
Individual users can be configured and authenticated upon each dial-in connection.
The user configuration can organize users based upon department and allow
individual users specific privileges. User features like expiration date and inactivity
timers can also be specified for each user.
Differences Between 833IS and Cisco Products
Although the design concepts and dial-in topology between the 833IS and Cisco
router products are similar there are specific differences that the users should be
aware of.
As explained in the Overview section, the 833IS is powered up and initially has a
default Factory firmware and configuration. Although various firmware versions
can be stored in flash memory, the default Factory firmware is stored in the
bootFlash (read-only) volume which users cannot modify. This protects the 833IS
unit from any corruption to the factory firmware. For instance, if a user deletes all