Cisco Cisco Expressway Maintenance Manual
Expressway Base Applications
The Expressway is available with alternative base applications as described below.
Expressway-C
Expressway-C delivers any-to-any enterprise wide conference and session management and interworking
capabilities. It extends the reach of telepresence conferences by enabling interworking between Session Initiation
Protocol (SIP)- and H.323-compliant endpoints, interworking with third-party endpoints; it integrates with Unified CM
and supports third-party IP private branch exchange (IP PBX) solutions. Expressway-C implements the tools required
for creative session management, including definition of aspects such as routing, dial plans, and bandwidth usage,
while allowing organizations to define call-management applications, customized to their requirements.
capabilities. It extends the reach of telepresence conferences by enabling interworking between Session Initiation
Protocol (SIP)- and H.323-compliant endpoints, interworking with third-party endpoints; it integrates with Unified CM
and supports third-party IP private branch exchange (IP PBX) solutions. Expressway-C implements the tools required
for creative session management, including definition of aspects such as routing, dial plans, and bandwidth usage,
while allowing organizations to define call-management applications, customized to their requirements.
Expressway-E
The Expressway-E deployed with the Expressway-C enables smooth video communications easily and securely
outside the enterprise. It enables business-to-business video collaboration, improves the productivity of remote and
home-based workers, and enables service providers to provide video communications to customers. The application
performs securely through standards-based and secure firewall traversal for all SIP and H.323 devices. As a result,
organizations benefit from increased employee productivity and enhanced communication with partners and
customers.
outside the enterprise. It enables business-to-business video collaboration, improves the productivity of remote and
home-based workers, and enables service providers to provide video communications to customers. The application
performs securely through standards-based and secure firewall traversal for all SIP and H.323 devices. As a result,
organizations benefit from increased employee productivity and enhanced communication with partners and
customers.
It uses an intelligent framework that allows endpoints behind firewalls to discover paths through which they can pass
media, verify peer-to-peer connectivity through each of these paths, and then select the optimum media connection
path, eliminating the need to reconfigure enterprise firewalls.
media, verify peer-to-peer connectivity through each of these paths, and then select the optimum media connection
path, eliminating the need to reconfigure enterprise firewalls.
The Expressway-E is built for high reliability and scalability, supporting multivendor firewalls, and it can traverse any
number of firewalls regardless of SIP or H.323 protocol.
number of firewalls regardless of SIP or H.323 protocol.
Standard Features
The primary purpose of the Expressway is to provides secure firewall traversal and session-based access to Cisco
Unified Communications Manager for remote workers, without the need for a separate VPN client.
Unified Communications Manager for remote workers, without the need for a separate VPN client.
Rich media session features
The following features are available when rich media session licenses are installed on the Expressway:
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SIP Proxy
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SIP / H.323 interworking
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IPv4 and IPv6 support, including IPv4 / IPv6 interworking
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QoS tagging
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Bandwidth management on both a per-call and a total usage basis
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Automatic downspeeding option for calls that exceed the available bandwidth
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URI and ENUM dialing via DNS, enabling global connectivity
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system and 500 rich media sessions on a Large
system
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1000 external zones with up to 2000 matches
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Flexible zone configuration with prefix, suffix and regex support
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Can be neighbored with other systems such as a Cisco VCS or other gatekeepers and SIP proxies
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Can be clustered with up to 6 Expressways to provide n+1 redundancy, and up to 4 x individual capacity.
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Intelligent Route Director for single number dialing and network failover facilities
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Call Policy (also known as Administrator Policy) including support for CPL
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Support for external policy servers
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Cisco Expressway Administrator Guide