Cisco Cisco IOS Software Release 12.4(23)
97
Release Notes for Cisco IOS Release 12.4
OL-7661-15
Platform-Specific Information
Cisco Signaling Link Terminals
This section contains the following sections with information that is specific to the
Cisco Signaling Link Terminal:
Cisco Signaling Link Terminal:
•
•
•
•
Introduction
The Cisco Signaling Link Terminal (SLT) enables service providers to reliably transport Signaling
System 7 (SS7) protocols across an IP network. The Cisco SLT uses the Cisco IOS SS7 Signaling Link
Terminal feature set, providing reliable interoperability with the Cisco PGW 2200 Softswitch. The Cisco
SLT is responsible for terminating the Message Transfer Part 1 (MTP 1) and MTP 2 layers of the SS7
protocol stack. Using the Cisco Reliable User Datagram Protocol (RUDP), the Cisco SLT backhauls, or
transports, upper-layer SS7 protocols across an IP network to the Cisco PGW 2200 Softswitch.
System 7 (SS7) protocols across an IP network. The Cisco SLT uses the Cisco IOS SS7 Signaling Link
Terminal feature set, providing reliable interoperability with the Cisco PGW 2200 Softswitch. The Cisco
SLT is responsible for terminating the Message Transfer Part 1 (MTP 1) and MTP 2 layers of the SS7
protocol stack. Using the Cisco Reliable User Datagram Protocol (RUDP), the Cisco SLT backhauls, or
transports, upper-layer SS7 protocols across an IP network to the Cisco PGW 2200 Softswitch.
In combination with this application-specific version of the Cisco IOS software, the Cisco SLT hardware
component leverages the widely deployed Cisco 2600XM series multiservice access router. The
Cisco 2600XM series, driven by a powerful RISC processor, provides the high performance required in
complex networking infrastructures.
component leverages the widely deployed Cisco 2600XM series multiservice access router. The
Cisco 2600XM series, driven by a powerful RISC processor, provides the high performance required in
complex networking infrastructures.
Note
When used as a Cisco Signaling Link Terminal device with a Cisco PGW 2200 Softswitch, the
Cisco 2611XM and Cisco 2651XM have SS7 functionality only; all standard Cisco 2611XM and
Cisco 2651XM software features are disabled when the Cisco SLT image is run. In that case, only the
Cisco Signaling Link Terminal document and the Cisco Media Gateway Controller documentation are
relevant.
Cisco 2611XM and Cisco 2651XM have SS7 functionality only; all standard Cisco 2611XM and
Cisco 2651XM software features are disabled when the Cisco SLT image is run. In that case, only the
Cisco Signaling Link Terminal document and the Cisco Media Gateway Controller documentation are
relevant.
When used for Signaling Link Terminal applications, the modular Cisco 2611XM and Cisco 2651XM
dual-Ethernet port routers can be configured with dual serial and the multiflex interface cards. The E1
multiflex interface cards offer integrated DSUs, and the T1 multiflex interface cards offer integrated
CSU/DSUs. For additional flexibility, the multiflex interface cards can also be ordered with a dual-port
drop-and-insert capability. All of these interface cards are Field Replaceable Units (FRUs).
dual-Ethernet port routers can be configured with dual serial and the multiflex interface cards. The E1
multiflex interface cards offer integrated DSUs, and the T1 multiflex interface cards offer integrated
CSU/DSUs. For additional flexibility, the multiflex interface cards can also be ordered with a dual-port
drop-and-insert capability. All of these interface cards are Field Replaceable Units (FRUs).
The Cisco SLT supports only the SS7 MTP 2 serial protocol. Therefore, the serial interfaces cannot be
configured for other protocols such as HDLC, PPP, X.25, LAPB, and Frame Relay.
configured for other protocols such as HDLC, PPP, X.25, LAPB, and Frame Relay.
Memory Recommendations
For memory recommendations for the Cisco Signaling Link Terminal in Cisco IOS Release 12.4, see the