E1 Span Configure 0x00D8

SwitchKit Name

E1SpanConfig

Type

EXS API and SwitchKit API message

Description

This message allows the host to configure the transmission format, line length, and SA bits of an E1 span.

Sent by

Host

Example Message

The following sample message configures an E1 span with the default coding method, signaling method, E1 Layer I management. CRC-4 and FEBE error checking are configured. The default line length, SA Registers, and TS 16 Register are also configured.

 

00 0F 00 D8 00 FF FF 00 01 0C 02 01 23 E8 00 F8 D0

SwitchKit Code

Configuration

E1SpanConfig (

Node = integer,

Span = integer,

Format = integer,

LineLength = integer,

SARegisters = integer,

TS16Registers = integer);

C Structure

typedef struct {

unsigned short Span;

UBYTE Format;

UBYTE LineLength;

UBYTE SARegisters;

UBYTE TS16Registers;

} XL_E1SpanConfig;

C++ Class

class XLC_E1SpanConfig : public XLC_SpanMessage {

public:

unsigned short getSpan() const;

void setSpan(unsigned short x);

UBYTE getFormat() const;

void setFormat(UBYTE x);

UBYTE getLineLength() const;

void setLineLength(UBYTE x);

UBYTE getSARegisters() const;

void setSARegisters(UBYTE x);

UBYTE getTS16Registers() const;

void setTS16Registers(UBYTE x);

};

EXS API Hex Format

MESSAGE (White)

RESPONSE (Gray)

Byte

Field Description

Byte

Field Description

0

Frame (0xFE)

0

Frame (0xFE)

1, 2

Length (0xNNNN)

1, 2

Length (0x0007)

3, 4

Message Type (0x00D8)

3, 4

Message Type (0x00D8)

5

Reserved (0x00)

5

Reserved (0x00)

6

Sequence Number

6

Same Sequence Number

7

Logical Node ID

7

Logical Node ID

:

AIB

Address Method

0x00 - Individual AEs

8, 9

Status MSB, LSB

10

Checksum

Number of AEs to follow

AE

0x0C Logical Span

:

Format

This field is a bit mask. The meaning of each bit is described below.
Unless otherwise stated, 0 = Disabled, 1 = Enabled.

 

0x01 - default for the CSP


Coding Method

Bit 0
0 Alternate Mark Inversion (AMI)

1 High-Density Bipolar Three-Bit Substitution (HDB3) (Default)


Error Checking

Bit 1 Enable CRC-4 Cyclic Redundancy Check

Bit 2 Enable FEBE (Far-End Block Error)

Enables the use of E-bits in the CRC-4 multiframe alignment signal for
the automatic reporting of a CRC error received during the previous multiframe.


Signaling Method

Bit 3
0 Channel Associated Signaling (Default)

In CAS mode, in-band line signaling for voice channels is carried in
timeslot 16.

1 Clear Channel

In Clear Channel mode, in-band line signaling is not transmitted in
timeslot 16.

Bit 4 Transmit all zeroes

Bit 5
0 E1 Layer I management (Default)

1 Euro-ISDN E1 Layer I management

For Euro-ISDN compliant E1, see Notes 4 and 5.

Bit 6
0 E1 Layer I management (Default)

1 Austel-ISDN E1 Layer I management

For Austel-ISDN compliant E1, see Notes 4 and 6.

Bit 7 Reserved, must be 0.

:

Line Length

0x00 G.703 ITU-T (75 ohm) (Default)

0x04 G.703 ITU-T (120 ohm)

:

SA Registers

This field is a bit mask. The meaning of each bit is described below.
Unless otherwise stated, 0 = Disabled, 1 = Enabled. The default for all bits is 1. See Note 3.


Bits 0–2 Reserved (must be 0)

Bit 3 Value to which all bits in SA Bit 4 Register should be set.

Bit 4 Value to which all bits in SA Bit 5 Register should be set.

Bit 5 Value to which all bits in SA Bit 6 Register should be set.

Bit 6 Value to which all bits in SA Bit 7 Register should be set.

Bit 7 Value to which all bits in SA Bit 8 Register should be set.

:

TS 16 Register

This field is a bit mask. The meaning of each bit is described below.
Unless otherwise stated, 0 = Disabled, 1 = Enabled. The default for all bits is 1. See Note 3.


Bits 0–3 Reserved (must be 0)

Bit 4 Value to which spare bit x1 in frame 0 of timeslot 16 should be set.

Bit 5 Reserved (must be 0)

Bit 6 Value to which spare bit x3 in frame 0 of timeslot 16 should be set.

Bit 7 Value to which spare bit x4 in frame 0 of timeslot 16 should be set.

:

Checksum

NOTES

1. To configure a single node for greater than 64 spans, please contact Excel technical support.

2. Note that the Excel message bit-numbering format is 0–7, while the SA Register and TS 16 Register formats are 1–8. Therefore, bit 3 of the host message format is bit 4 of the SA Register and TS 16 Register formats, and so on.

3. This message is backward-compatible to previous software releases.

4. Refer to ITU-T Recommendation G.704 more details on programming SA bits and spare timeslot 16 bits.

5. To use Euro-ISDN Layer 1, you must use an SE1LC Rev. B11 or greater. For more information, refer to the appropriate "Hardware Product Descriptions."

6. For Euro-ISDN compliant E1, set the following:
(Bit 0 = 1) Line format to HDB3
(Bit 1 = 1) CRC
(Bit 2 = 1) FEBE
(Bit 3 = 1) E1 clear Channel
(Bit 5 =1) Euro-ISDN Layer I
Line length to G.703

7. For Austel-ISDN compliant E1, set the following:
(Bit 0 = 1) Line format to HDB3
(Bit 1 = 1) CRC
(Bit 2 = 1) FEBE
(Bit 3 = 1) E1 clear Channel
(Bit 6 = 1) Austel-ISDN Layer I
Line length to G.703

Default E1 Format

The table below shows the default format for E1 spans.You must enable Clear Channel signaling to use timeslot 16 (Channel 30) as a voice channel or for out-of-band signaling (for example, an ISDN application).

NOTE: Clear Channel signaling must be enabled to use timeslot 16 (channel 30) as a D channel in ISDN applications.

Timeslot

Channel

Description

0

31

Alarms and framing

1

0

Voice channels

2

1

3

2

4

3

5

4

6

5

7

6

8

7

9

8

10

9

11

10

12

11

13

12

14

13

15

14

16

30

In-band line signaling (CAS)

17

15

Voice channels

18

16

19

17

20

18

21

19

22

20

23

21

24

22

25

23

26

24

27

25

28

26

29

27

30

28

31

29