SM-D-48FXS-E Specifications
Cisco SPA Interface Module – 48-Port FXS Module
Manufacturer: Cisco
Manufacturer Model: SM-D-48FXS-E
Product Line: SPA Interface Modules
Product Series: 48 FXS
Product Type: Voice interface module
Product Name: Cisco 48-Port FXS SPA Module
KEY FEATURES:
48 × FXS ports for analog voice lines
Provides POTS connectivity for IP telephony systems
Supports VoIP gateways and Cisco Unified Communications Manager integration
Tone generation, ring voltage, and line voltage compliant with regional standards
Supports caller ID, call waiting, and hook-flash signaling
Compatible with Cisco SPA 9000 series and ISR routers with SPA slots
PERFORMANCE:
Maximum simultaneous calls: up to 48 (one per port)
Codec support: G.711, G.729a/b, G.726
Echo cancellation: up to 128 ms tail length
DTMF signaling: In-band, Out-of-Band (RFC 2833), and SIP INFO
ENVIRONMENTAL & RELIABILITY:
Operating Temperature: 0 °C to 40 °C (32 °F to 104 °F)
Relative Humidity (Operating): 10%–90%, non-condensing
Power Consumption: ~35 W typical
MTBF: Enterprise-class reliability
Compliance: UL, CE, FCC, RoHS
PHYSICAL:
Form Factor: SPA interface module for compatible Cisco chassis
Dimensions: ~1.2″ H × 14″ W × 10.5″ D
Weight: ~3.0 lb (~1.36 kg)
COMPATIBILITY & USE CASES:
Supported Platforms: Cisco SPA 9000 series, Cisco ISR routers with SPA slots
Ideal For: Enterprise voice deployments, small-to-medium branch offices
Use Case: Adding analog voice lines to IP telephony infrastructure; connecting traditional POTS phones and fax machines
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