Key Features
The main features of the Cisco MGX 8950 OC-192c/STM-64 ATM Switch Service Module are listed here.
Full nonblocking, full-duplex line-rate throughput
High reliability with hot-standby 1+1 ATM switch service module card redundancy
Per-virtual-path and per-virtual-circuit traffic shaping and available bit rate (ABR) with virtual source and virtual destination
Up to 4 million cell buffers
Up to 16 classes of service (CoS) that can be used to support IP or ATM services
Support for standards-based Private Network-to-Network Interface (PNNI), switched virtual circuit (SVC) and switched virtual path (SVP), 
soft permanent virtual connection (SPVC) and soft permanent virtual path (SPVP), 
and Multiprotocol Label Switching (MPLS) services

Chassis Compatibility : 
Cisco MGX 8950
Software Compatibility : 
Cisco MGX Software Release 4.0.15 and above
Protocols : 
ATM and SONET/SDH
Port Density : 
1 port
Layer 1 (Physical Layer) Feature Summary
User-Network Interface (UNI) 3.0, 3.1, and 4.0 physical layer specifications
Compliance with the following SONET standards:
Bellcore GR-253-CORE
ANSI T1.105
Compliance with the following SDH standards:
ITU-T G.707, G.708, G.709, and G.783
ITU-T G.957 and G.958
Additional Physical Layer Specifications for Ports and Optics
Network Management : 
Managed by Cisco WAN Manager software suite
Based on Simple Network Management Protocol (SNMP)
Power : 
Input power required: -48 VDC
Power consumption: 205W
Physical Dimensions : 
H x D: 15.83 x 15.65 in. (40.20 x 39.75 c