Baud Reset Button; Interface Numbering; Specifications - Cisco 1900 series Hardware Installation

Interface Numbering

Baud Reset Button

The Cisco 1905 and Cisco 1921 ISRs have a baud reset button on the back panel. When the button is
pressed during power on, ROMMON resets the router to the default console port configuration. If the
baud reset button is pressed for longer than 30 seconds, the router defaults to the read-only ROMMON
image. The default console port configuration is 9600 baud, 8 data bits, 1 stop bit, no parity, and flow
control is set to none.
Interface Numbering
Each individual interface (port) on a Cisco 1900 series router is identified by a number. The Cisco 1900
series routers contains the following wide-area network (WAN) and local-area network (LAN) interface
types:
•
•
The numbering format for the slots is interface-type 0/slot-number/interface-number.
summarizes the interface numbering. See
Table 1-6
Slot Number
Onboard Ports
Slot 0
Slot 1
Note On the Cisco 1900 series router, the numbering format for configuring an async interface is 0/slot/port. To
configure the line associated with an async interface, simply use the interface number to specify the
async line. For example, line 0/0/0 specifies the line associated with interface serial 0/0/0 on a
WIC-2A/S in slot 0. Similarly, line 0/1/1 specifies the line associated with interface async 0/1/1 on a
WIC-2AM in slot 1.

Specifications

Table 1-7
specifications for Cisco 1940 series routers.
Table 1-7
Description
Physical
Dimensions without rubber feet
(H x W x D)
Cisco 1900 Series Hardware Installation
1-14
Two onboard Gigabit Ethernet (GE) LAN interfaces
Two slots in which you can install WICs, VWICs (data only), and HWICs. The Cisco 1905 comes
with a factory installed EHWIC in the right slot.
Interface Numbering
Slot Type
10/100/1000 Ethernet
EHWIC/HWIC/WIC
EHWIC/WIC/VWIC
lists the specifications for Cisco 1905 and Cisco 1921 series routers.
Cisco 1905 and 1921 Series Router Specifications
Figure 1-5 to identify the slot numbers.
Slot Numbering Range
0/0 and 0/1
0/0/0 to 0/0/0 (single-wide)
0/1/0 to 0/1/0 (single or double-wide)
Specification
1.75 in x 13.5 in x 11.5 in (4.4 cm x 34.3 x 29.2 cm), 1 RU
Chapter 1 Overview of the Router
Table 1-6
Table 1-8 lists the
1
OL-19084-02
2
height