Troubleshooting guide

1-2
Cisco PGW 2200 Softswitch Release 9.8 Operations, Maintenance, and Troubleshooting Guide
OL-0800-14
Chapter 1 Cisco PGW 2200 Softswitch Platform Overview
Cisco PGW 2200 Softswitch Platform
• Providing Message Transfer Part (MTP) Level 3 (MTP3) functions
• Providing advanced intelligent network (AIN) capabilities
Sun UNIX Hosts
The Cisco PGW 2200 Softswitch Release 9.8 Software Installation and Configuration Guide identifies
the Sun UNIX hosts that support the releases of the Cisco PGW 2200 Softswitch software.
To attain continuous service and reliability, install and configure two Sun UNIX hosts for system
redundancy. The call-processing application is active on one Cisco PGW 2200 Softswitch and
automatically switches to the standby Cisco PGW 2200 Softswitch only if the active host goes out of
service.
Cisco SS7 Interfaces
The Cisco PGW 2200 Softswitch platform interfaces to an SS7 network through Cisco IP Transfer Point
LinkExtenders (ITP-Ls) or Cisco IP Transfer Points (ITPs).
Cisco ITP-Ls
The Cisco ITP-Ls terminate Message Transfer Part (MTP) levels 1 and 2 of the SS7 protocol.
Cisco routers, for example, the Cisco 2800, backhaul the remaining SS7 layers by running the Reliable
User Datagram Protocol (RUDP) over an Ethernet 10BASE-T or 100BASE-T interface.
The number of signaling network connections available on each Cisco ITP-L depends on the router you
install in the chassis. You can use multiple Cisco ITP-Ls (up to 16 per Cisco PGW 2200 Softswitch
platform) to support signaling channels. You can configure the Cisco ITP-L with redundant connections
to the control signaling network. Redundant connections eliminate the Cisco ITP-L as a possible single
point of failure in the Cisco PGW 2200 Softswitch platform. The Cisco ITP-L supports V.35, T1, and E1
interfaces to the SS7 network.
Cisco ITPs
The Cisco ITPs terminate all levels of MTP and the Service Connection Control Part (SCCP) layer of
the SS7 protocol. The Cisco ITP backhauls the remaining SS7 layers across an IP network to the Cisco
PGW 2200 Softswitch. The Cisco ITP transmits data that conforms to the SIGTRAN standards and MTP
Level 3 User Adaptation (M3UA/SUA). The transmissions also comply with the Stream Control
Transmission Protocol (SCTP) and pass through an Ethernet interface.
The number of signaling network connections on each Cisco ITP depends on the router you use. Refer
to the Release Notes pertaining to the Cisco ITP software for a list of the routers that support the Cisco
ITP and the potential number of signaling network connections.
Cisco Switches
Cisco switches provide the Ethernet backbone for the Cisco PGW 2200 Softswitch platform. You can
deploy LAN and WAN implementations. See the Release Notes pertaining to the Cisco PGW 2200
Softswitch software for a list of the Cisco switches that should be selected to form the Ethernet
backbone.