Configuring the SS7 Multi-Protocol I/O

Purpose

This section describes how to configure the SS7 Multi-Protocol I/O (SS7 MP I/O) card which supports the V.35 electrical interface. The V.35 interface allows an SS7 link to terminate on a separate channel freeing the channel used on a span.

Before you begin

The system software treats the SS7 Multi-Protocol I/O card as another line interface card. When the system software detects the card (either when the system powers up or if the SS7 MP I/O is inserted while the CSP is running), it notifies the host using the Card Status Report message (0xA6).

Channels and Connectors

Up to four 2090 channels can be connected to a V.35 interface using the SS7 MP I/O card. The choice of electrical interface is set using the SS7 Signaling Link Configure message. Each port can be independently configured to run at 48, 56, or 64 Kbps. As with the electrical interface, the choice of data rate is set with the SS7 Signaling Link Configure message.

There are four timeslots available, one per port or connector. The timeslots map to channels as follows:

The SS7 MP I/O supports four channels, out of a possible 2048 in a 2090 chassis. This card differs from regular E1/T1 cards in that the system selects the four channels when the user assigns a Logical Span ID to the card. The system tries to allocate the four channels for an SS7 MP I/O card by first selecting unused channels on a T1 card. If these are not available, (that is, there are no T1 cards in the system), it then utilizes the full bandwidth required for an 8-span E1 card (256 channels), even though only four channels are used. However, up to four SS7 MP I/O cards will share this 256-channel block.

If there is no bandwidth available (that is, if 64 E1 spans are in the chassis), and the Assign Logical Span message is sent, the Assign Logical Span will receive a response of NACK with a status code of "0x28: No DSP Resources Available".

Configuring Multi-Protocol

The SS7 MP I/O card functions like the E1 or T1 card and is configured the same way. The following steps summarize the basic procedure.

The I/O card is programmed for the link data rate and the electrical interface via the SS7 Signaling Link Configure and SS7 Signaling Link Query messages.

Sample Configuration File

Below is an example of a configuration file using the API format to configure an SS7 MP I/O card for V.35 traffic and to bring V.35 links into service.

’ SS7 Software license

00 19 00 79 00 00 ff 01 02 24 10 46 46 41 59 34 4e 46 4b 4d 42 41 4c 4c 32 30 4b

’ Assign logical spans

00 0d 00 a8 00 00 ff 00 01 11 04 ff ff ff ff ’ de-assign them all first

00 0d 00 a8 00 00 ff 00 01 11 04 00 14 36 00 ’ V.35 Card, slot 0x36

-----------------------------------------------------------------------

Service State Configure, all spans in-service

-----------------------------------------------------------------------

00 0d 00 0a 00 00 ff 00 01 0c 02 00 14 f0 00 ’V.35

’ SS7 Signaling Stack Configure with stack 00

’00 16 00 5c 00 00 ff ’header

’00 01 21 02 03 ’Slot AIB

’00 ’Stack

’00 00 00 06 ’ OPC

’03 01 01 02 01 03 01 ’ modules, type, variant, type, variant, type, variant

00 16 00 5c 00 00 ff 00 01 21 02 03 00 00 00 00 06 03 01 01 02 01 03 01

Trace for stack 01:

’00 16 00 5c 00 00 ff ’header

’00 01 21 02 03 ’Slot AIB

’01 ’Stack

’00 00 00 03 ’OPC

’03 01 01 02 01 03 01 modules, type, variant, type, variant, type, variant

00 16 00 5c 00 00 ff 00 01 21 02 03 01 00 00 00 03 03 01 01 02 01 03 01

’ PPL Timer Configure (T20=10msec)

00 10 00 cf 00 00 ff 00 01 08 01 00 00 3d 01 01 00 01

00 10 00 cf 00 00 ff 00 01 08 01 01 00 3d 01 01 00 01

’ PPL Timer Configure (T21=20msec)

00 10 00 cf 00 00 ff 00 01 08 01 00 00 40 01 01 00 02

00 10 00 cf 00 00 ff 00 01 08 01 01 00 40 01 01 00 02

’ SS7 Signaling Link Set Configure for Stack 00

’00 0f 00 5d 00 00 ff ’ Header

’00 01 1e 02 00 00 ’Link Set AIB

’00 00 00 03 ’APC

00 0f 00 5d 00 00 ff 00 01 1e 02 00 00 00 00 00 03

’ SS7 Signaling Link Set Configure for Stack 01

’00 0f 00 5d 00 00 ff ’header

’00 01 1e 02 01 01 ’Link Set AIB

’00 00 00 06 ’APC

00 0f 00 5d 00 00 ff 00 01 1e 02 01 01 00 00 00 06

’ SS7 Signaling Link Configure for stack 00

’00 14 00 5e 00 00 ff ’Header

’00 02 1f 03 00 00 04 0d 03 00 14 00 ’combination Link ID ’and Channel AIB

’02 ’signaling link code

’00 ’data rate

’01 ’V.35 electrical interface, dte

00 14 00 5e 00 00 ff 00 02 1f 03 00 00 04 0d 03 00 14 00 02 00 01

’ SS7 Signaling Link Configure for stack 01

’00 14 00 5e 00 00 ff ’Header

’00 02 1f 03 01 01 05 0d 03 00 14 01 ’combination Link ID ’and Channel AIB

’02 ’signaling link code

’00 ’data rate

’02 ’V.35 electrical interface, dce

00 14 00 5e 00 00 ff 00 02 1f 03 01 01 05 0d 03 00 14 01 02 00 02

’ SS7 Signaling Route Configure for stack 00

’00 14 00 5f 00 00 ff ’ Header

’00 01 20 05 00 00 00 00 00 ’SS7 Destination/Route AIB

’00 00 00 03 ’DPC

’00 ’Link Set ID

’00 ’Priority

00 14 00 5f 00 00 ff 00 01 20 05 00 00 00 00 00 00 00 00 03 00 00

’ SS7 Signaling Route Configure for stack 01

’00 14 00 5f 00 00 ff ’ Header

’00 01 20 05 01 00 01 00 01 ’SS7 Destination/Route AIB

’00 00 00 06 ’DPC

’01 ’Link Set ID

’00 ’Priority

00 14 00 5f 00 00 ff 00 01 20 05 01 00 01 00 01 00 00 00 06 01 00

’ Service State Configure (SS7 links for stack 00)

’00 0d 00 0a 00 00 ff ’Header

’00 01 09 02 00 04 ’SS7 Signaling Link AIB

’f0 ’Action

’00 ’Flag

00 0d 00 0a 00 00 ff 00 01 09 02 00 04 f0 00 ’ V.35

’00 0d 00 0a 00 00 ff ’Header

’00 01 09 02 00 05 ’SS7 Signaling Link AIB

’f0 ’Action

’00 ’Flag

00 0d 00 0a 00 00 ff 00 01 09 02 01 05 f0 00

Clock Source

You must use the SS7 Signaling Link Configure message to set the clock source for this card. The clock source can be specified independently for every port. The options for clock source include the following:

Data Terminal Equipment (DTE): Derives clock from incoming data.

Data Communications Equipment (DCE): Derives clock from CSP system timing.