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L3 Call Reference (0x0008)

Purpose

L3 Call Reference uses configuration byte and PPL timer information.

L3 Call Reference Configuration Bytes

These values are for connection to the Lucent 4ESS. See L3 Default Settings per Connection Type for variations from the defaults shown here for other Connection Types.

Asterisks (*) denote default values.

Byte

Description

Values

0x01

Connect Ack Option (Send a Connect Ack in response to a Connect.)

0x00 = Disabled (False)
* 0x01 = Enabled (True)

0x02

Reserved

None

0x03

Status Enquiry Option (Send a Status Inquire message rather than a Status message when receiving an invalid message in the NULL state.)

* 0x00 = Disabled
0x01 = Enabled

0x04

The accepted received Bearer Capability Bit Mask.

0x01 = Voice
0x02 = 3.1 KHz Audio
* 0x03 = Voice and 3.1 KHz
Audio
0x04 = Unrestricted 56K
0x08 = Unrestricted 64K
0x10 = Restricted 64K
0x20 = 384 K
0x40 = 7.1 KHz Audio

0x05

Channel ID encoding of extension bit (octet 5 in channel ID IE)

* 0x00 = Extension (Ext.)
bit set
0x01 = Ext. bit cleared

0x06

Call Proceeding Option (send call proceeding once the call is answered, not automatically after receiving SETUP)

* 0x00 = Disabled
0x01 = Enabled

0x07

Number of SETUP resends (after T303 expiry)
NOTE: Not applicable for JATE variant

0x01 = Resend

0x08

Acceptable Information transfer rate. In BCC IE for incoming calls.

0x01 * = CIRC (Circuit) mode 64K

0x02 = CIRC mode 2_64K

0x04 = CIRC mode 384K

0x08 = CIRC mode 1563K

0x10 = CIRC mode 1920K

0x20 = CIRC mode MULTIRATE

0x09

Send CONNECT ACK indication to the host.

0x00 = Disabled (default)
0x01 = Enabled

0x0A

Call Reference Allocation can be set to (FALSE) which always takes the next value in the list, or (TRUE) which takes the first unused value always searching from the start of the list.

0x00 = False (Default)
0x01 = True

 

0x22

Number of re-transmission of Status Enquiry Request.

*0x00

QSIG/PSS1 only

0x23

Send Unexpected Segmented Message to host

0x00 = Disabled
*0x01 = Enabled

0x24

Send Segmentation Failure - Wrong or Unexpected Segmented Message to host

0x00 = Disabled
*0x01 = Enabled

Euro-ISDN Only

0x08

Connect ACK to host

0x00* = Do Not Send

0x09

STATUS to host

0x00* = Do Not Send

0x0B

Glare Control

0x00* = Drop Outgoing

 

 

L3 Call Reference PPL Timers

The table below shows the PPL Timer values for the ISDN component ISDN L3 Call Reference (0x0008).

* denotes use for Euro-ISDN only. ** denotes use for Lucent 4ESS, 5ESS and DMS-100 and 250 only. Refer to API Reference for more information about ISDN.

Timer ID

Description

Default Values (seconds)

0x0002*

Q.931 T302

15

0x0003

Q.931 T303

4

0x0004*

Q.931 T304

15

0x0005

Q.931 T305

4

0x0008

Q.931 T308

4

0x000A**

T310**

25

0x000D

Q.931 T313

4

L3 CR NI 2 User Side Timers

The following table shows the PPL Timers available for use with L3 CR NI 2 User Side:

Timer

Timer Index

Value (10 ms)

T303

3

400

T305

5

400

T308

8

400

T309

9

9000

T310

10

3000

T313

13

400

T322

22

400

L3 CR NI 2 Network Side

The following table shows the PPL Timers available for use with L3 CR NI 2 Network Side:

Timer

Timer Index

Value (10 ms)

T301

1

30000

T303

3

400

T305

5

400

T306

6

3000

T308

8

400

T309

9

9000

T310

10

3000

T313

13

400

T322

22

400

L3 Call Reference PPL Events

The table below shows the PPL Event Indications for QSIG/PSS1.

PPL Event Indication

0x0001

Name

Unexpected Message Segment

Description

The Excel platform sends this PPL Event Indication to the host when a Segmented Message, coming from the upper layer, is not proceeded by a call processing message containing a Segmented IE. This usually happens when the host sends a L4 SEGMENT PPL Event Request, without first sending a call processing message containing a Segment ICB.

PPL Event Indication

0x0002

Name

Segmentation Failure - Wrong or Unexpected Segmented Message

Description

The Excel platform sends this PPL Event Indication to the host when a failure occurs in the segmentation procedure due to an invalid Segmented Message or Segmented Message with a different Call Reference IE.