Filter
Top Products
1-59
Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter 1 Product Overviews
Cisco MGX 8880 Media Gateway
Features and Benefits
Table 1-9 lists the features and benefits of the Cisco VXSM.
Table 1-10 lists specifications for VXSM features.
Table 1-9 VXSM Features and Benefits
Feature Benefit
High density
• Scales up to 8064 VoIP DS-0s per service module
• Lowers capital expenditures and operating expenses by maximizing density
per platform
• Allows 40,320 VoIP DS-0s per chassis and 120,960 VoIP DS-0s per rack,
with echo cancellation
TDM interfaces
• Offers scalable optical interfaces; available with 2- or 4-port OC-3/STM-1
interfaces per service module
• Provides scalable electrical interfaces; up to 48 T1/E1 interfaces per service
module
High availability Ensures carrier-class reliability by providing active call preservation
Integrated
nonblocking
architecture
Lowers entry, scaling, and operations cost by integrating TDM, network
processing, and digital-signal-processor (DSP) technology onto a single module
Table 1-10 VXSM Feature Specifications
Feature Description
Call control H.248, MGCP, TGCP
Signaling interfaces Signaling System 7 (SS7) and Inter-Machine Trunk (IMT); ISDN Primary Rate
Interface (PRI)
Voice compression G.711, G.726, G.729a/b, Clear Channel
Voice features
• G.165, G.168-2000 integrated, nonblocking echo cancellation;
programmable up to 128 ms
• Transparent transcoding between a-law and µ-law encoding
• Voice Activity Detection, Silence Suppression, and Comfort Noise
Generation
• Fixed and Adaptive Jitter Buffering
• Tone detection and regeneration including dial tone, busy, ring back, and
congestion with local country variants; programmable tones
• Dual Tone Multi Frequency (DTMF) relay (RFC 2833)
Modem and Fax
• Fax and modem pass-through
• T.38 Fax Relay
IP
• Real-time Transport Protocol (RTP) (RFC 1889), DTMF Relay (RFC
2833), Differentiated Services (DiffServ) aware
ATM Standards-based ATM Adaptation Layer 2 (AAL2)