Cisco Cisco MGX Voice Internetworking Service Module (VISM) データシート
Data Sheet
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Applications
Features and Benefits
Tables 1 through 5 provide information about the Cisco VISM-PR.
Table 1.
Features and Benefits of Cisco VISM-PR
Feature
Benefit
8T1/E1 interfaces
per module
per module
●
Cost-effective entry and scalability
Time-division multiplexing
(TDM) interfaces
(TDM) interfaces
●
Direct termination of 8 T1 or 8 E1 interfaces
●
T3, OC-3, or STM-1 interface connectivity using optional Service Resource Module (SRM)
Packet technology
●
VoIP and VoATM (ATM Adaptation for AAL1 and AAL2)
●
Support for standalone and softswitch-based applications
High availability
●
Cisco MGX platform support for 1:1 common equipment redundancy and 1:N Cisco VISM-PR
redundancy
Deployment flexibility
●
Proven successful deployments with Cisco and partner softswitches worldwide
●
VoIP and VoATM support with the same hardware and software
Table 2.
Overview of Cisco VISM-PR Protocols and Features
Feature
Description
Call control
●
MGCP, TGCP
Signaling interfaces
●
Channel Associated Signaling (CAS), Feature Group D (FG-D) support for E911 and operator
services, Signaling System 7 (SS7) and Inter-Machine Trunk (IMT), and ISDN Primary Rate
Interface (PRI)
Interface (PRI)
Voice compression
●
G.711, G.723.1, G.726, G.729a/b, Clear Channel
Digital-signal-processor
(DSP) features
(DSP) 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 activated detection, silence suppression, and comfort noise generation
●
Fixed and adaptive jitter buffering
●
Preprogrammed and configurable support for tone detection and generation
●
Dual Tone Multi Frequency (DTMF) relay for IP and ATM
●
DTMF relay to softswitch
●
CAS signal translation and manipulation
●
Continuity test support
●
Bit Error Rate Test (BERT) and loopback test (with optional SRM)
Modem and fax
●
T.38 Fax Relay (gateway or softswitch controlled)
●
Fax and modem passthrough
IP
●
Real-Time Transport Protocol (RTP) and RTP Control Protocol (RTCP) (RFC 1889)
●
DTMF Relay (RFC 2833)
●
Resource Reservation Protocol (RSVP) and Call Admission Control (CAC)
ATM
●
Standards-based AAL2 Adaptation and subcell multiplexing
●
Support for Constant Bit Rate (CBR), Real-Time Variable Bit Rate (VBR-rt), and Non-Real-
Time VBR (VBR-nrt) ATM traffic classes
Announcements
●
Onboard announcement storage and playout
Lawful intercept
●
Lawful intercept (Communications Assistance for Law Enforcement Act [CALEA]) support for
call content
Management interfaces
●
Simple Network Management Protocol (SNMP)
●
Command-line interface (CLI)
●
Telnet
●
Secure Shell (SSH) protocol
●
FTP