Table of Contents
Overview of the Cisco 633
This chapter provides an overview of the Cisco 633 modem. It also describes the general applications available with the Cisco 633.
Note This chapter documents general product features available in the Cisco 633 product line. Please refer to the release notes document for a current list of upgraded software features.
The Cisco 633 channel service unit/digital service unit (CSU/DSU) modem converts frame relay (FR) frames into Asynchronous transfer mode (ATM) cells and performs Frame Relay Forum (FRF.8) service interworking by translating FR-encapsulated data into ATM data and transports it over a synchronous digital subscriber line (SDSL).
The following figure illustrates the Cisco 633 SDSL modem.
Figure 1-1: Front View of the Cisco 633

The following sections define all system features of the Cisco 633.
- Supports a FRF implementation agreement (FRF.8) to provide a Permanent Virtual Connection (PVC) interworking between FR and ATM technologies. This supports the translation of FR packets to ATM cells over SDSL.
- Provides a synchronous serial port with the following components:
- 12-in-1 Smart Serial connector
- CCITT V.35 protocol support
- Data Communication Equipment (DCE) support
- Auto-select serial mode support via a cable attachment
- Full-Duplex support
- Provides an SDSL port with the following components:
- UTP RJ11 connector
- SDSL interface at 784Kbps transmit and receive support
- Provides a UART serial port with the following components:
- UTP RJ45 connector
- Support for baud rate of 38,400 bps
- Support 5 to 8 bits per character, parity, 1 to 2 stop bits, and break detection
- Support for Receive (RXD) and Transmit (TXD) signals only, no modem control support
- Supports an i960JA/SMPLSAR PCI architecture
- Contains 4MB EDO DRAM memory
- Contains 2MB FLASH memory
- Supports a Mueslix ASIC - HDLC controller
- Supports an external universal power supply with 5V @ 2A output.
Routing Support
- FCC Part 15, 1997 - United States Federal Communications Commission Part 15, Subpart B
- VCCI, 1995 - Agreement of Voluntary Control Council for Interference by Information Technology Equipment (VCCI Japan), August 1995
- AS/NZS 3548: 1995 - EMI (Australia), Spectrum Management Association
- EN55022: 1994/CISPR 22: 1993 - Limits and methods of measurement of radio interference characteristics of information technology equipment.
- EN50081-1:1997 - Electromagnetic compatibility - Generic emission standard, Part 1: Residential, commercial and light industry
- CNS 13438 - EMI Standard (Taiwan) regulated by BCIQ Agency
- UL 1950 3rd Edition
- TUV per EN60950/IEC950 Amendment 4
- CE Marked for EMC and Safety
Bridging Support
Management
- HTML browser interface
- Command-line interface
- Telnet support
- TFTP
- SNMP MIB support
- Multi-level password protection
The following table describes the function of the connectors and switches on the Cisco 633 back panel. See Figure 1-2 for the location of the connectors described in the following table.
Table 1-1: Function of Connectors
| Connector Label
| Connector Description
|
PWR
| Power Connector
|
Serial (Blue)
| 12-in-1 V.35 Data Terminal Equipment (DTE) serial connector. Connects to a 5-in-1 V.35 Data Communications Equipment (DCE) serial port on a Cisco modem.
|
MGMT (Light Blue)
| RJ-45 Management Connector. Connects to the serial port on your PC or laptop.
|
WALL (Lavender)
| SDSL Connector. Connects to the wall jack.
|
Figure 1-2: Rear View of Cisco 633

The Cisco 633 is equipped with 4MB of Extended Data Out (EDO) DRAM that has a throughput of 60 nanoseconds.
The 633 operates in an ambient temperature environment of 32º to 104ºF (0º to 40ºC) and is stored in an ambient temperature environment of -40ºto 185ºF (-40ºto 85ºC).







Posted: Mon Jan 10 12:56:41 PST 2000
Copyright 1989-2000©Cisco Systems Inc.