Troubleshooting Guide

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AT&T SS7 Linkset Is Either Unavailable or

Inaccessible

Document ID: 20514

Contents

Introduction

Prerequisites

Requirements

Components Used

Conventions

Background Information

Cisco ICM 4.1 and Earlier Versions

Cisco ICM 4.2 and Later Versions

Problem

Cause

Solution

Cisco ICM 4.1 and Earlier Versions

Cisco ICM 4.2 and Later Versions

Related Information

Introduction

This document provides a background and solutions for AT&T SS7 Linkset error messages such as, "SS7

linkset unavailable" and "SS7 network inaccessible".

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

This document is not restricted to specific software and hardware versions.

Conventions

Refer to Cisco Technical Tips Conventions for more information on document conventions.

Background Information

In older versions of Cisco Intelligent Contact Management (ICM), which include ICM 4.1 and earlier, the

Network Interface Controller (NIC) and the gateway act as a single process that runs on a DOS machine. In

ICM 4.2 and later versions, the NIC is a process that runs on the Router node while the SS7 gateway is a

separate node.

Summary of content (4 pages)

PAGE 1
AT&T SS7 Linkset Is Either Unavailable or Inaccessible Document ID: 20514 Contents Introduction Prerequisites Requirements Components Used Conventions Background Information Cisco ICM 4.1 and Earlier Versions Cisco ICM 4.2 and Later Versions Problem Cause Solution Cisco ICM 4.1 and Earlier Versions Cisco ICM 4.
PAGE 2
Cisco ICM 4.1 and Earlier Versions Intelligent Call Processing (ICP), a service of AT&T, allows customer premises equipment to participate in call routing at the network level. The ICM CallRouter uses ICP to receive call routing requests, and to return call routing responses to the AT&T SS7 signaling network. Within ICM, the ICP interface is implemented as a dedicated computer and process, called the Network Interface Controller (NIC).
PAGE 3
One or more signaling links help to achieve connection to an SS7 network. The physical link interface implementation is through adapter cards inserted into the gateway PC. The gateway can support up to two PCI SS7 adapter cards although one card is adequate for most installations. Each adapter card provides four signaling links and requires a dedicated PCI slot within the machine. You can use one, two, three or four links per card as necessary.
PAGE 4
Contact Technical Support to open, check, or update a service request with the Cisco Technical Assistance Center (TAC). Cisco ICM 4.2 and Later Versions Specifically, these types of messages indicate that the Cisco ICM SS7 gateway does not receive digital clock pulses from the AT&T network. As a first step, cold−boot the problematic Cisco ICM SS7 gateway. If the problem persists after you cold boot the Cisco ICM SS7 gateway, open a trouble ticket with both Cisco and AT&T for further investigation.