Chapter 3 System Features
DSP2 Voice Server Module
3-76
255-700-025
PacketStar
™
Access Concentrator 60 User Guide
, Issue 1
Release 6.3.0
DSP2A and DSP2B Single-Mode Voice Server Modules (System Release 6.2.0)
!
CAUTION:
The DSP2A and DSP2B Single-Mode Modules are not upgradable to
System Software Release 6.3.0.
See Table 3-10 for a summary of DSP2A and DSP2B Single-Mode Voice
Server Module features.
Outstanding differences between the single-mode DSP2A and DSP2B
modules and the DSP2C module include:
Table 3-10. Matrix of Features and Standards Supported on the Single-Mode DSP2A and DSP2B
Voice Server Module (Release 6.2.0)
Release 6.2.0
Single Mode Modules
DSP2A
DSP2B
Channels
128
128
Voice Compression
G.726
G.729A
Silence Suppression
Lucent
G.729B
Comfort Noise
Lucent
G.729B
Non-Multiplexed AAL-2
Supported
Supported
Echo Cancellation (near end)
G.165
G.168
G.165
G.168
Echo Cancellation Tails Supported
Up to
32 msec
Up to
32 msec
DTMF Digit Collection /Regeneration
Not
Applicable
Supported
Dynamic Bandwidth Circuit Emula-
tion Service (DBCES) Functionality
Supported
Supported
Caller ID
Supported
Supported
DSP Failure Alarm/Reboot Function-
ality
Supported
Supported
Dynamic DSP Resource Allocation
Supported
Supported
Fax/modem Bypass of
Compression and Echo Cancellation
Supported
Supported
Fax Modulation/ Demodulation
Not Applicable
Not Applicable
Soft Permanent Virtual Circuit (SPVC)
Support
Not Supported
Not Supported
DSP A/B/C Mode Hybrid
Configurations on DSP2C Module
Not Applicable
Not Applicable
Mu-law/A-lawPCM Code
Conversion
Supports ITU-T
G.711
Supports ITU-T
G.711