Key Features
The main features of the Cisco 8-Port OC-12/STM-4 Channelized/Unchannelized ATM Switch Service Module are listed here.
Full nonblocking, full-duplex line-rate throughput on all 8 ports when used on the Cisco MGX 8950 chassis
Up to 4 ports with nonblocking, full-duplex line-rate throughput when used on the Cisco MGX 8800 chassis
Individual port channelization down to DS-3 and OC-3c/STM-1
Per-virtual-path and per-virtual-circuit traffic shaping and available bit rate (ABR) with virtual source and virtual destination
APS (1:1 and 1+1) port redundancy, plus APS 1+1 card redundancy
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 8830/B, MGX 8850, MGX 8850/B, MGX 8880, and MGX 8950
 
Software Compatibility
Cisco MGX 8800/8900 Software Release 5.2.00 and above for Cisco MGX 8830/B, MGX 8850, MGX 8850/B, and MGX 8950
Cisco MGX 8800/8900 Software Release 5.3.00 and above for Cisco MGX 8880
 
Protocols
ATM and SONET/SDH
 
Port Density
8 ports (4 ports at full line rate on the Cisco MGX 8800 chassis)
 
Network Management
Managed by Cisco WAN Manager software suite
Based on Simple Network Management Protocol (SNMP)
 
Power
Input power required: -48 VDC
 Power consumption: 134W
 
Physical Dimensions
H x D: 15.83 x 15.65 in. (40.20 x 39.75 cm)
 
Weight
6.5 lb (2.95 kg)