Troubleshooting guide

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Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
OL-5169-01
Chapter 1 Solution Overview
Solution Components
CALEA Server
The Cisco BTS 10200 supports the Communications Assistance for Law Enforcement Act (CALEA).
• The Cisco BTS 10200 provides the PacketCable EMS/RADIUS interface for the transmission of call
identifying information (call data) to the CALEA delivery function (DF) server. The BTS 10200
implementation is independent of the access network application, such as packet cable or T1.
• The call content function captures voice in the form of a replicated realtime transport protocol (RTP)
stream. The replicated RTP stream is sent to the CALEA DF server upon request from the CA. The
CA request is addressed to the appropriate intercept access point, such as:
– An aggregation router—Sent via control commands based on the Common Open Policy Service
(COPS) protocol
– A trunking gateway—Sent via MGCP commands
Note The CALEA call data and call content features are currently based on industry-developed standards,
including the PacketCable Electronic Surveillance Specification (PKT-SP-ESP-I01-991229). Cisco
will post information regarding the impact of any future technical requirements necessary to permit
telecommunications carriers to comply with CALEA’s assistance capability requirements.
CALEA Call Data Function
There are two call data functions supported by the Cisco BTS 10200.
• The Cisco BTS 10200 supports a secure provisioning interface to process intercept and wiretap
requests from law enforcement agencies. (The service provider organization can limit viewing and
provisioning of these parameters to selected authorized personnel.) The applicable parameters
(entered via CLI) include the subscriber ID and DN, trap type, and call data channel for data
transmission. The trap type specifies whether the tap order is a pen register (outgoing call
information), a trap and trace (incoming call information), a pen and trace (incoming and outgoing
call information), or an intercept (bidirectional plus the call content).
• The Cisco BTS 10200 supports the requirements of the enhanced PacketCable Event Messages
Specification (EMS) PKT-SP-EM-I02-001128 tailored for CALEA as specified by the PacketCable
Electronic Surveillance Specifications PKT-SP-ESP-I01-991229 and PKT-SP-ESP-D02-991207.
Full call-identifying information (call data) is shipped to a CALEA DF server from the Cisco BTS
10200 for the subject under surveillance for various call types (basic call, call forwarding, and so
on). A CALEA DF server compliant with the PacketCable Electronic Surveillance Specifications,
and per Cisco wiretap interface specification, must be deployed in the network.
DHCP, DNS, TFTP and TOD Servers
A DHCP server must be installed at the headend. The DHCP server must also offer a time-of-day (TOD)
server option that is compliant with RFC 868.
In conjunction with the DHCP server, a Domain Name System (DNS) server must be installed to
translate names of network nodes into IP addresses. A Trivial File Transfer Protocol (TFTP) server must
be installed to facilitate the transfer of DOCSIS configuration files over the broadband network.
Cisco provides a configuration tool with every Cisco uBR7246VXR universal broadband router—Cisco
Network Registrar (CNR)—to automate dynamic IP address allocation to cable modems, PCs, and other
devices on the broadband network. CNR provides integrated DHCP and DNS services for your network
configuration.