Cisco EPC3925 Fiche technique - Page 5
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Specification
Value
Voice (continued)
Voice CODEC support
Negotiate CODEC to use based on ordered list
CODECs
Standard: G.711, T.38 Fax Relay, iLBC and BV16
Software upgradeable to support other CODEC combinations including:
● G.711 and G.728
● G.711 and G.729
● G.711 and G.729 a/e
● G.711 and BV16 and BV32 (High fidelity – near CD quality)
● G.711 and G.723
● G.711 and G.726
Line Diagnostics
GR-909
CODEC Packetization
10, 20, or 30 mS
Levels
CODEC Synchronization
CODEC synchronization to UGS time clock allows slip-free end-to-end sync to PSTN clock
(minimizes frame slips that can cause Fax/Analog Modem call failures)
CODEC Encryption
Configurable to support AES-128 encryption or no encryption modes
Hearing Impaired Services
TDD support including detection of V.18 including Annex A
Support
Fax and Analog Modem
DSP based Modem/Fax Tone detection and support for Voice Band Data Mode with
support
auto-CODEC negotiation and auto-control of echo canceller, jitter buffer, and voice activated
detection (VAD)
Jitter Buffer Support
Adaptive dynamically controlled
Latency Control
Configurable min / max jitter buffer size
Audio Gain Levels
Independently configurable transmit and receive audio gains
Silence Suppression
Configurable VAD with comfort noise generation
Packet Loss Concealment
ANSI T1.521-1999
Call Connection Quality
RTCP, RFC 1889, RFC 1890, SNMP MIB for last call quality statistics
Monitoring
Dialing Modes
DTMF and configurable pulse dial support
DTMF Relay
RFC 2833 including fast (40mS) DTMF Relay for alarm system signaling compatibility
● Full EuroPacketCable secure DQOS with GateID including UGS and UGS/AD
Layer 2 Quality of Service
● DQOS Lite support including UGS and UGS/AD
Layer 3 Quality of Service
Configurable DiffServe/TOS support for Signaling, RTP, and RTCP flows
● Supported for RTP and RTCP packet flows to reduce per-call network bandwidth
Payload Header
Suppression (PHS)
● Advanced support for Dynamic Payload Header Suppression using Propane Technology
Management
SNMPv3, SNMPv2, Telnet with configurable user ID and password, internal log, and external
Syslog support
● G.168 with extended echo tail support
Echo Cancellation
● 32 mS max tail length
VAD
Voice activity detection
CNG
Comfort noise generation
Voice band data
Machine tone detection used to auto switch to data optimized CODEC configuration
T.38 Fax
Supports V.29 and V.17 Modem
Data Sheet
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