Troubleshooting guide

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Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
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Chapter 1 Solution Overview
Solution Components
Cisco BTS 10200 Capabilities
At a high level, the Cisco BTS10200 Softswitch provides the following capabilities:
• Support for MGCP call control with the TGWs and NCS signaling on the MTA side.
• Call signaling capabilities including SS7/ISUP interactions with the PSTN SS7 network, which
includes support for SCP database dip applications like 800 number and LNP services.
• Universal Signaling interworking functions between protocols associated with each leg of the call.
• Address resolution and call routing.
• CDR or event message generation.
• Resource management and connection control.
• Service access function for services executing on external server platforms (such as Feature Servers,
SCPs, and so on).
• Management interfaces (using SNMP and/or CORBA and/or CLIs).
• Gate management function and DQoS support.
The Cisco BTS 10200 Softswitch, Figure 1-6,is deployed in a fully redundant active/stand configuration
where the secondary call agent takes over if the primary call agent fails. It has been designed for high
availability (99.999%) with no single point of failure. A single Call Agent consists of an active unit, a
standby unit, and a separate set of links to terminate SS7 traffic.
Other Cisco BTS 10200 elements, including Feature Servers and EMSs, are also deployed in
active/standby configurations with real time synchronization of data between the active and standby
elements. If no response is received from the primary call agent, the alternate call agent becomes the
primary CA. Call state information is copied from the active to the standby call agent. This ensures that
no established calls are lost in a switch over from active to standby.
The call control signaling between the gateways and the call agent uses the standard MGCP 1.0
specifications where when no response is received from the primary call agent, the alternate call agent
becomes the primary call agent. Feature Control Protocol (FCP) is used to interact with third party
application platforms for enhanced services and SIP-T is used for inter-call agent communications. The
control interaction between the messaging platform and the Cisco BTS10200 is via SIP or SIP-T. The
Cisco BTS 10200 EMS collects the call information including billing CDRs (or event messages) and call
logs and sends it to the Record Keepng Server (RKS).
The Call Agent runs on a Continuous Computing platform or on Sun Solaris hardware and SS7/ISUP
trunks terminate on this platform. It provides the call processing intelligence for the network, handling
call control for the establishment and tear-down of calls, the service logic required to deliver services,
the linkages to signaling networks and the appropriate hooks to operational support systems (OSS). Call
processing is performed with MGCP 1.0/NCS 1.0 call control signaling.
Feature servers, which provide the logic for enhanced services, are part of this complex. An EMS system
which manages the Call Agent and the Feature Servers and provides subscriber/network provisioning
functions is also part of the Call Agent infrastructure residing in the SuperPOP. The Cisco BTS 10200
Softswitch also supports deployment of Feature Servers on separate platforms. The call routing
intelligence resides on the Call Agent and feature logic on the Feature Server.