The ISUP GATEWAY - ISUP interface for TCP/IP platforms - it is a unit that connects generic TCP/IP platforms to the public telephone switching signaling network - allowing the implementation of many types of services.

Functions

• Add/Drop of ISUP signaling channels
• Endpoint SS#7
• Remote controlled call establishment
• Remote controlled call supervision
• TCP/IP network interface

Advantages

• Compatible, flexible and easy maintained
• Open TCP/IP control interface with Multi-Service Platforms
• Low cost for acquisition, installation and operation
• Own hardware for E1/T1 interface
• Modular easy expanding system

Applications

• Multi-Service Platforms (ex.: Call-Center, Pre-Paid, etc.)
• Anti-Fraud systems (black-list and call disconnection)
• ISUP interface to Voice Response Units
• 0800 freephone
• Televote
• Traffic Control
• Call Screening (ex.: to deny automatic collect calls to registered called numbers)

Fixed Pre-Paid Platform utilizing the ISUP Gateway
(ITS - São Paulo)

Utilization

ISUP Gateway can be connected between two public switching centers (Mode I - ISUP Tunneling) or to only one switching center (Mode II - Voice Loopback) and also to Call Centers (Mode III -ISUP interface to Call Centers). All affected calls must be routed to the ISUP Gateway controlled route. Two ISUP Gateway can control the same route where redundancy is necessary.

Mode I - ISUP Tunneling

• Two SS7 ISUP interfaces(one at each side)



• The ISUP GW do not have a Signaling Point Code



• For each side the ISUP GW acts as a proxy to the other side



• Metallic trough-connected emergency switch keeps the link during ISUP GW out-of-service states

Mode II - Voice Loopback

• One SS7 ISUP interface



• The ISUP Gateway has a Signaling Point Code



• ISUP Gateway acts as a transit exchange (Virtual Transit Exchange)



• All the E1/T1 inks in the route are connected in loopback

Mode III - ISUP interface to Call Centers

• One ISUP interface and one Signaling Point Code



• TCP/IP communication with Call Center



• Any number of links to each Voice Response Unit



• Any number of VRUs

Event report and operation:

Syslog Agent

• Syslog is a event report system used by the ISUP GW
• Events are E1/T1 alarms, signaling events, traffic reports, etc.
• Syslog manager are available in the market
• E-mail alerts

WEB Server

• ISUP protocol display
• Access CDRs in HTML tables
• Access to events log
• Download of CDR files