User guide

1-2 Cisco 2500 Series Access Server User Guide

Access Server Hardware Features

The access server has the following hardware features:

• 8 or 16 ports for connection to modems, terminals, or other asynchronous

(EIA/TIA-232) equipment

• 2 MB to 16 MB (depending on the selected feature set) of primary memory, using

dynamic random-access memory (DRAM) single in-line memory modules (SIMMs)

• 32-KB nonvolatile random-access memory (NVRAM) to store conﬁgurations

• 4-MB to 8-MB Flash memory for running the Cisco Internetwork Operating System

(Cisco IOS) image

• 2-MB shared packet memory

• Two synchronous serial ports for connection to a WAN

• EIA/TIA-232 console port for connection of a console terminal

• EIA/TIA-232 auxiliary port for connection of a terminal or modem

Note EIA/TIA-232 and EIA/TIA-449 were known as recommended standards RS-232

and RS-449 before their acceptance as standards by the Electronic Industries Association

(EIA) and Telecommunications Industry Association (TIA).

The serial WAN connections use a proprietary, 60-pin connector. The Ethernet and

Token Ring connections use standard LAN cabling with an attachment unit interface (AUI)

or DB-9 connector.

The console terminal is used to provide basic and emergency local system access. The

auxiliary port is used to provide basic and emergency remote system access.

The access server uses a 68-pin connector and breakout cable, which provides 8 RJ-45 ports

on each cable. These ports use RJ-45-to-DB-25 adapters to connect to asynchronous

devices.