Cisco SPA-4XCT3/DS0-V2 4-Port Channelized T3 (DS0) Shared Port Adapter
The Cisco SPA-4XCT3/DS0-V2 is a 4-port channelized T3 WAN module for DS0/DS1 aggregation in carrier and enterprise networks.
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The Cisco SPA-4XCT3/DS0-V2 is a high-density WAN interface module. It is part of the Cisco SPA portfolio and is used in Cisco routers with SPA/SIP architecture such as ASR and 7600 series.
This module provides 4 × channelized T3 (DS3) ports, each supporting DS0 and DS1 channelization. It allows flexible bandwidth allocation across multiple services and circuits.
Each port operates at 44.736 Mbps (T3), delivering a total bandwidth of up to ~178 Mbps across all ports.
The adapter supports key WAN protocols including:
- PPP (Point-to-Point Protocol)
- HDLC
- Frame Relay
With channelized architecture, the SPA allows service providers to divide T3 bandwidth into smaller units (DS1/DS0). This makes it ideal for legacy telecom and carrier environments where flexible circuit provisioning is required.
It is a hot-swappable module, meaning it can be installed or replaced without powering down the router—critical for maintaining uptime in production networks.
Key Features:
- 4 × Channelized T3 (DS3) ports
- Supports DS0 / DS1 / DS3 channelization
- 44.736 Mbps per port (T3 speed)
- Total bandwidth up to ~178 Mbps
- Supports PPP, HDLC, Frame Relay
- Hot-swappable (OIR support)
- Uses 75-ohm BNC connectors
- Designed for carrier-grade WAN aggregation
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