Overview
The Sprint SP-645ME-A1 is an ADSL modem-router combo from Sprint’s discontinued 645 series. Based on ZyXEL Prestige 645R architecture, this unit provides integrated ADSL WAN connectivity and LAN bridging for small office or remote lab deployments. The SP-645R-A1 variant designation includes DHCP protocol support, making it suitable for automatic IP configuration in mixed network environments.
Key Features
- ADSL WAN Interface: Supports upstream to 800 Kbps and downstream to 8 Mbps (service-dependent)
- 10/100 Mbps Ethernet LAN Port: Full or half-duplex operation for local network connectivity
- DHCP Bridge Mode: DHCP-enabled configuration for automated client IP assignment
- Software-Configurable: Via SMT (System Management Terminal) web interface or serial console
- Compact Desktop Form Factor: Suitable for testing labs, legacy network maintenance, or archival systems
Technical Specifications
- Modem Type: ADSL (Asymmetric Digital Subscriber Line)
- ADSL Downstream Rate: Up to 8 Mbps (line-dependent)
- ADSL Upstream Rate: Up to 800 Kbps (line-dependent)
- LAN Interface: 10/100M Ethernet (RJ-45)
- Protocol Support: DHCP, TCP/IP, RFC 1483, LLC/VC multiplexing
- Management Interface: SMT (web browser or CLI)
- Series: Sprint 645 / ZyXEL Prestige 645R-based
- Condition: New in Box
Typical Applications
- Legacy ADSL network testing and troubleshooting
- Remote lab or development environments requiring ADSL WAN
- Archival or historical network documentation projects
- Educational demonstrations of ADSL bridging and routing
- Replacement for failed or discontinued 645 series units in maintained networks
Compatibility & Replacements
Compatible With
- Legacy ADSL service providers supporting 8 Mbps downstream profiles
- Standard Ethernet networks with 10 or 100 Mbps capability
- DHCP-enabled client devices (computers, printers, IP phones)
- Linux, Windows, macOS systems via web-based SMT interface
Replaces / Drop-In Replacement For
- Sprint SP-645M-A1 (modem variant)
- Sprint SP-645R-A1 (router-only variants with different firmware versions)
- ZyXEL Prestige 645R (OEM equivalent)
Works With
- ADSL telephone lines (standard RJ-11 connection)
- Ethernet 10/100 Mbps networks (RJ-45)
- TCP/IP and DHCP configuration protocols
- Web-based SMT management terminal (port 80/443)
- Serial console management (RS-232, DB-9)
