You are here: CSP Developer’s Guide: Common Channel Signaling > 13 V5.2 PPL Information > L3P PSTN (0x91)

L3P PSTN (0x91)

Purpose

L3P PSTN uses PPL configuration byte, event, and timer information.

L3P PSTN Configuration Bytes

Byte

Description

Values (* Default)

0x01

Send optional SIGNAL message (with steady
signal=Rev Polarity) upon off-hook.

* 0x00 = Send SIGNAL message
0x01 = Do not send SIGNAL message

0x02

Send optional SIGNAL message (with steady
signal=Normal Polarity) upon on-hook.

* 0x00 = Send SIGNAL message
0x01 = Do not send SIGNAL message

0x03

Deallocation option upon receiving Call Clearing message (send Channel Remove to BCC upon receiving on-hook, DISCONNECT or DISCONNECT COMPLETE)

* 0x00 = Send Channel Remove to BCC
0x01 = Do not send Channel Remove to BCC

0x04

Deallocation option upon sending
DISCONNECT (LE side only)

* 0x00 = Send Channel Remove to BCC
0x01 = Do not send Channel Remove to BCC

0x05

Call Collision Priority

* 0x00 = Incoming call has priority
0x01 = Outgoing call has priority

0x06

Number of digits to receive before sending the SETUP Indication

Default = 10 digits

0x07

Request For Service Format

* 0x03 = V5 Formatted ICB

0x08

Specified the connected PPL state for PSTN

* 0x04

0x09

Config. Byte offset to IE Table. First Byte is
number of IEs in table.

* 0x32

0x0A

Calling Party Control

0x00

0x0B

Send L3 ESTABLISH Indication to L5

* 0x00 = Do not send PPL Event Indication
0x01 = Send PPL Event Indication

0x0C

Reserved

 

0x0D

Send L3 SIGNAL Indication to L5

* 0x00 = Do not send PPL Event Indication
0x01 = Send PPL Event Indication

0x0E

Send L3 STATUS Indication to L5

* 0x00 = Do not send PPL Event Indication
0x01 = Send PPL Event Indication

0x0F

Reserved

 

0x10

Reserved

 

0x11

Reserved

 

0x12

Send L3 PROTOCOL PARAMETER
Indication to L5

* 0x00 = Do not send PPL Event Indication
0x01 = Send PPL Event Indication

0x14

Send SIGNAL messages with digit info for Called Party

* 0x00 = Do not send SIGNAL message
0x01 = Send SIGNAL message

0x15

Pulse Notification IE included in last SIGNAL message (Overlap Sending Option).

* 0x00 = Include
0x01 = Do not include

0x16

Stores Pulse Duration Type value Pulsed-Signal IE (FLASH Request)

* 0x00

0x17

Stores Suppression Ind. value Pulsed-Signal IE (FLASH Request)

* 0x00

0x18

Stores Acknowledge Request Ind. value for Pulsed-Signal IE (FLASH Request)

* 0x00

0x1A

Do not wait for SIGNAL messages with CLD (called) party number digits before sending SETUP Indication to L4

* 0x00 = Wait for digits
0x01 = Do not wait for digits

0x1B

Default Pulse Type to indicate a Switch Hook Flash

* 0x76 = Register Recall

0x20

Ringback Tone Option

* 0x00 = Do not play Ringback
0x01 = Send PPL Event Indication

* 0x00 = Do not play Ringback
0x01 = Do play Ringback (make sure DSP card is configured with correct function type).

L3P/L5 Events

PPL Event Request (L5 to L3P)

PPL Event Indication (L3P to L5)

0x0000 Reserved
0x0002 SIGNAL Request
0x0003 Reserved
0x0004 Reserved
0x0005 Clear Request
0x0006 PROTOCOL PARAMETER Request

0x0000 Event Layer 3 Establish
0x0002 Reserved
0x0003 Event Layer 3 Signal
0x0004 Event Layer 3 Status
0x0005 Reserved
0x0006 Reserved
0x0007 Event Layer 3 Protocol parameter (only for AN side)
0x0014 Purge: PSTN initiated Purge for Userport when timeslot unknown
0x0015 Purge: PSTN returned to Idle state after purge
0x0096 ERROR: No Channel Remove Acknowledge from BCC upon PURGE
0x0097 ERROR: No Disconnect Complete from L3 upon PURGE

L3P PSTN PPL Timers

When specifying new timer values, remember that all PPL Timers are specified in 10 ms increments. For example, a PPL timer for 4 seconds is specified as 4000 (decimal, 400 x 10 ms = 4 seconds), which is the hexadecimal value of (0x190).

Timer ID

Description

Value (default)

0x01

Layer 3P BCC Response Wait

8 seconds

0x02

Signal (On-hook/Normal Polarity)/Disconnect Complete Wait

4 seconds

0x03

Layer 3 Digit Wait Timer

4 seconds

0x04

Layer 4 Clear Wait Timer

4 seconds

0x05

Layer 3 Establish Acknowledge Wait

4 seconds