Chapter 4
Configuring VISM Features
Added support for G.726: 16, 24, 32, and 40 kbps, with packetization periods ranging from 10 to 40
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ms
Support for VBR-rt (variable bit rate real time) and VBR-nrt (non real time) ATM traffic classes,
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including traffic shaping to the relevant traffic descriptors
Configurable VAD model parameter for traffic engineering
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In E1 applications, support for 31 DS0 per span and a total of 248 channels per card
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Tested CRTP support through RPM for voice and voice band data calls
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Verified bearer interoperability with 3810
Switched PVCs using SGCP 1.5:
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Support for card level coexistence of switched AAL2 mode (under Call Agent control) and trunked
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AAL2 mode on PVCs, on an endpoint (DS0) basis
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PBX CAS event delivery to a Call Agent using SGCP 1.5:
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Interoperability and configuration enhancements:
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Added support for custom profile 110 and 200 (clear channel), ITU profiles 3 and 8
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User-configurable AAL2 Silence Indicator Description (SID) for all profiles
Type 3 Packet Support for proxy ringback (xrbk), packet side bearer continuity check (co3/co4
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COT), and midcall DTMF relay
Connection admission control (CAC) enhancements:
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Configurable AAL2 cell fill timer
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AAL2 alarm enhancements: per span, VC, and per channel (CID) conditioning
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Display, clear, and reset AAL2 performance related counters
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In E1 AAL2 trunking applications, support for 31 DS0 per span and a total of 248 channels per card
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Verified bearer interoperability with 3810 and third-party vendors
Infrastructure work and enhanced support for three operating modes: VoIP switching, AAL2
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trunking, and switched AAL2 PVC
Graceful upgrade VISM 2.0 and 2.0(1) to VISM 2.1(0)
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The ability to enable or disable the call agent protocol SDP OST feature in the event the peer
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gateway may or may not support SDP OST. This feature allows interoperability with the Cisco
AS5300 Universal Access Server and other equipment
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
SDP and SGCP extensions allowing xGCP call agent control of AAL2 bearers
Support of SGCP 1.5 digit maps and error codes
DTMF: Wink and ground start
MF: Wink
TFTP download of CAS variant state machine
Configurable codec strings (IANA naming conventions as well as customized ones)
Profile negotiation and configurable preference order
Configurable voice and VBD (for example, up-speed codec) per profile
Patented CAC method factoring in VAD and subcell multiplexing savings
Configurable VAD model parameter for traffic engineering
Configuring Additional VISM Features
Cisco VISM Installation and Configuration Guide
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