Configuring JT ISUP Variant Stack

Purpose

The present ISUP implementation in the system software, by default, supports Japanese Telecom ISUP variants in the SS7 stack. If ISUP messages must be added or removed to conform to JT ISUP variants, use SS7 ISUP Message Format Configure.

Before you begin

Obtain an ISUP license from your sales representative.

Configuring JT ISUP Variant Stack

The steps below describes how to configure the JT ISUP variant stack.

1 Download your ISUP license using Product License Download.

2 Create a stack for the JT variant using SS7 Signaling Stack Configure.

• Set the MTP Module Type (0x01) to the JT Module Variant (0x08)

• Set the ISUP Module Type (0x02) to the JT Module Variant (0x08)

• Set the L3P Module Type (0x03) to the JT Module Variant (0x08)

3 Download the customized PPL tables for the variant. Note that the JT/TTC variant does not require a protocol, only that an SS7 stack be configured. The NTT/DDI variant requires customized PPL tables. Contact Technical Support for these tables.

4 Set the configuration byte for the PPL components, HMDT and HMRT to a variant, 0x01. Modify PPL Config Bytes with the PPL Configure message, as follows:

• HMDT (0x002B)

Set Config Byte 0x01 (Variant) to 0x02 (Japan/TTC) or 0x04 for NTT

Set Config Byte 0x04 (National Indicator) to 0x00 (International)

Set Config Byte 0x12 (Japan A/B plane verification) to enable Japan
A/B plane verification.

• HMRT (0x002C)

Set Config Byte 0x01 (Variant) to 0x02 (Japan/TTC) or 0x04 for NTT

Set Config Byte 0x04 (National Indicator) to 0x00 (International)

Set Config Byte 0x06 (Message Priority) to 0x03.

Set Config Byte 0x12 (Japan A/B plane insertion) to enable Japan A/B plane insertion.

5 Modify PPL Timer values with the PPL Timer Configure message, as follows:

• TPRC (0x003D)

Set timer 1 (T20) to 0x0001 (10ms)

• TSRC (0x0040)

Set timer 2 (T21) to 0x0002 (20ms)

Important! MTP PPL configuration byte and PPL timer values are listed in the chapter, SS7 PPL Information. National variants may require additional User Part and protocol modifications.