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Feature Benefit

Zone control and

bandwidth management

●

Support for remote zone monitoring

●

Support for remote zone redundancy

●

Support for up to 1000 neighbor zones (including Cisco VCSs, border controllers, gatekeepers, and SIP proxies)

●

Support for subzone area definition for bandwidth management

●

Support for flexible zone configuration with named zones and default zone

●

Support for forwarding of requests to neighbor zones

●

Support for registration control (open, specifically allow, and specifically deny)

●

Support for interzone bandwidth management: Definable call by call

Maximum bandwidth per call

Maximum aggregate bandwidth for all neighboring zones

●

Support for intrazone bandwidth management: Definable call by call

Maximum bandwidth per call

Maximum aggregate bandwidth

●

Support for auto-down-speeding if call exceeds per-call maximum

●

Support for gateway load balancing

●

Support for automatic network failover

●

Support for capacity warnings for users and administrators

Network

●

Support for DNS addressing

●

Support for IPv4 and IPv6 simultaneously

●

Support for IPv4 and IPv6 translation services

Scalability and Capacity

Single VCS capacity:

(appliance or small and

medium virtual-machine

deployments)

●

The capacity of one Cisco VCS (appliance or small and medium virtual machine) follows:

Up to 2500 registrations

Up to 500 nontraversal calls

Up to 100 traversal calls

Up to 1000 subzones

Single VCS capacity:

(large virtual-machine

deployments)

●

The capacity of one Cisco VCS (large virtual machine) follows:

Up to 5000 registrations

Up to 500 non-traversal calls

Up to 500 traversal calls

Up to 1000 subzones

Clustered VCS capacity

●

Up to six VCS appliances or virtual machines can be clustered to increase capacity and provide redundancy.

●

Clustering increases the maximum registrations, traversal, and nontraversal calls by up to four times.

Microsoft Lync

Interworking Capacity

The maximum number of calls interworked to Microsoft Lync is 100. It is highly recommended that a separate

VCS-Control server is deployed for use as a dedicated Microsoft Lync gateway.

System Security and Resilience

Security features

●

Secure management with HTTPS, SSH, and SCP

●

Secure file transfer

●

Inactivity timeout

●

Ability to lock down IP services

●

Authentication required on HTTP(S), SSH, and SCP

●

H.235 authentication support

●

Transport Layer Security (TLS) for SIP signaling

●

Roles-based password-protected GUI user access

●

Ability to enforce strict passwords

●

Ability to disable root access over SSH

●

Automated intrusion protection

●

Delegated credential checking across a traversal zone

●

Federal Information Processing Standards (FIPS) 140-2-compliant cryptographic modules

Resilience and reliability

●

Ability to deploy Cisco VCS Expressway in a redundant (six) cluster

●

Ability to share licenses across a cluster

●

Ability for registrations to survive system restart

●

Ability to replicate configuration for clusters

●

Ability for the Cisco VCS Expressway process to recycle within seconds

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