C&C08 Switch No.7 signaling tup conversion ISUP scheme

Absrtact: This paper introduces the necessity of changing the tup of C&C08 switch No.7 signaling in Tianjin local telephone network to IsUp, and the scheme and arrangement of the transformation.

Keywords: local telephone network; No.7 signaling; Telephone user section; Integrated Business section

1 The necessity of changing the signaling and the problems that should be paid attention to

At present, the No.7 of the local telephone network in Tianjin is being carried out by the Telephone User section (TUP) to the Integrated Business User section (ISUP). As you know, the TUP message for No.7 signaling is fixed in the format of the message Signal Unit (MSU), so the limited bit bit of tup message can only support the business form of voice service, with a little new business. With the continuous evolution of the communication market and the rapid development of IT technology, customer demand is constantly changing, the traditional voice business can not meet the needs of some group companies and higher-income high-end customers, and the urgent need for communication operators to provide more flexible, More user-friendly access and more new business, Integrated Services Digital Network (ISDN) is to meet customer demand for a communication network.

ISDN uses the No.7-isup signaling approach, which can give full play to the advantages of long signaling messages and support for a variety of complementary services, support nx64kbit/s broadband services, and achieve complete digitization of end-to-end (user to user) channels. At present, the support of Tianjin local telephone network to ISDN service is limited to the small user group, the traffic volume is very small, if the signaling mode of telephone network is reformed, it can enlarge the business and further adapt to the need of the communication market. For example, in recent years, in the Tianjin local telephone network, a number of new 128-mode C&C08 switches, of which the two central counties is the switch, which to the city 3, 4, 6, 7 The inter-agency relay in which the Exchange Bureau (MS) is a no.7tup is an order for a new business to be opened if it is transformed into a No.7 of Tup signaling in the form of No.7 isup Inter-Council signaling.

Of course, this transformation is not technically complex, but it needs to take full account of the impact on the whole network. If some did bureau and public network or between the No.1 signaling, after the transformation, No.1 and No.7 tup cooperation becomes with No.7 isup cooperation. In the same way, it will involve V5, R2 signaling and isup, and so on. In addition, some of the new services currently hosted by ISDN in the local telephone network, although largely responsive to customer demand, have not yet been able to launch "videophone" operations in some suburban bureaus, indicating that there may be some problems with these bureaus. Furthermore, in the Tianjin local telephone network with the new Bureau of the network, the structure is also constantly adjusting and changing, online data flow will change with the network structure changes .... Therefore, we must pay attention to analyze and solve the above problems before making tup transformation into ISUP implementation plan, which is an important condition for the success of this transformation.

2 Transformation Plan

At present, Tianjin local telephone network C&C08 to long-distance communications between the Bureau No.7 tup No.7 isup work is underway, the transformation of the county End Bureau is also through the experimental Bureau to explore experience. The transformation of the work is a "smooth transition" of the scheme, that is, in the process of tup variable isup using the "Edge Delete Side Plus" method, so that long-distance service in the use of the original Tup relay group routing, can normally choose the road to the new IsUp relay group Road. The scheme needs to increase the IsUp relay group xx after the original relay group, and no longer inherit the old relay group number to the long-distance station.

The link of the No.7 signaling to the long-distance station, is generally passed through 4, 6MS signaling Turn-point (STP) or 3, 7MS STP transfer, basically does not occupy the end bureau to long-distance bureau port and so on hardware resources. If the end to long-distance station relay TUP channel does not contain signaling link data, then in the process of transformation Tup also does not involve the signaling link changes, so that the transformation of the work can be simplified.