5.1.2 Multi-Device Connection (for U.S. Only)

5.1.2	Multi-Device Connection (for U.S. Only)

Definition

The HiPath 3000 systems support ISDN data and video devices using an industry-standard ST interface. The ISDN terminal devices are connected to the system using the ISDN adapter or a port on an S0 interface card:

•	STLS4 for the HiPath 3350 and HiPath 3550

•	STLS4R for the HiPath 3300 and HiPath 3500

The ISDN devices are assigned a call number for internal dialing and an 11-digit Multiple Subscriber Number (MSN) for incoming DID applications.

Each ST port consists of two 64 Kbps channels. Two devices can be connected to the ISDN adapter. Eight devices can be connected to an S0 port on an interface card. The devices connected on an S0 port share the 128 Kbps bandwidth for video and data calls.

Basic Rate Interface (BRI) Operation

In a BRI environment, each CO B channel is assigned a Special Profile Identifier (SPID) number and a Terminal Identifier (TID) for identification purposes from the Public Network. The SPID and TID received from the network provider must be associated with the call number assigned to the data or video equipment connected to the ST interface. If a system is equipped with three BRI trunks, the maximum number of ISDN data sessions is either three 128-Kbps sessions or six 64-Kbps sessions. Typically CACH (Call Appearance Call Handling) values or Phantom Directory numbers are required for voice terminals only. In some COs, CACH values or Phantom Directory numbers can be required for the ST data devices as well.

Due to the complexity of BRI configuration, it is recommended that ST applications be limited to 128 Kbps. The call number for each ST port must be associated with a Public Network SPID. This means that the number of 64-Kbps channels that can be called up is limited to the number of public-network SPIDs.

Refer to the Configuration Note for S0 Device Installation.

The STLS4 module is used also as a trunk interface in Europe. For subscriber applications, the receive and transmit leads must be reversed before connecting to the first device on the bus. This crossover is already performed in the ISDN adapter.

Usually the ST device is connected to an ISDN NT-1 adapter and the SPID-TID numbers assigned by the CO are programmed in the device. However, since the ST device is located behind the switch on an ST bus, the HiPath 3000 provide SPID-TID identification control. Each ST channel used by the ST device requires a Call Number for internal dialing. An MSN number also is required to enable the ST device to communicate with the HiPath 3000 system.

The protocol should always be set to ATT NI-1 in the ST device. The HiPath 3000 perform all protocol conversions.

Primary Rate Interface (PRI) Operation

In a PRI or CorNet-N environment, SPIDs, TIDs and CACH values are not required. Internal SPID/TID entries called Multiple Subscribers Numbers (MSN) are used by the ST devices for call setup. DID numbers must be assigned to each channel that connects to an ST device.

The numbers issued by the CO can be assigned as DID numbers. The DID number can contain between 1 and 11 digits. The DID numbers are required to set up incoming calls to the device.

Assign a call number to each No-Port station port used for the ST device. This call number can contain between 1 and 6 digits. The call number does not need match the DID number.

An MSN number must be assigned to the ST device for each B-Channel required for the application. The MSN numbers act as SPIDs for the ST device. The MSN number can be from 7 to 14 digits. If the entry is 9 to 14 digits, the last 2 digits are used as the TID number. The last 2 digits should be 00 for B channel 1, and they should be 01 for B channel 2 on each ST interface used.

It is suggested that the MSN number consists of the DID number, followed by 5 zeros, followed by a 2-digit TID number.

HiPath 3000/5000 V8, Feature Description, Issue 10		up

Disclaimer & Copyright	ID: P31003H3580F100017618	2011-02-07