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Cross Connect Channel 0x001A

SwitchKit Name

CrossConnectChannel

Type

EXS API and SwitchKit API message

Description

Cross Connect Channel 0x001A

This message makes a connection between two channels’ data paths. No signaling information can be used to detect either channel releasing. The host must tear the connection down using the Cross Disconnect Channel message.

If you cross-connect T1 and E1 channels, the result is automatic PCM conversion (A-law/µ-law). By default, channels on T1 spans are µ-law and channels on E1 spans are A-law. To disable conversion, as would be required if you connect through an ISDN D channel or SS7 link, you must configure both channels with the same format using the PCM Encoding Format Configure message.

This message is supported by the VDAC-ONE card but not the IP Network Interface Series 2 card.

NOTE: When cross-connecting channels across nodes in an CSP system, a separate message must be sent to each channel in the connection.

For example, you would send one message to Node 1: Cross Connect Channel A, B. You would send another message to Node 2: Cross Connect Channel B, A.

You can use optional fields for Encoding Format and Pad Value, which are described below the message table. The Encoding Format and Pad Value fields are required for cross-connections involving separate nodes in a multi-node system only.

Sent by

Host

SwitchKit Code

Configuration

CrossConnectChannel (

Node = integer,

SpanA = integer,

ChannelA = integer,

SpanB = integer,

ChannelB = integer,

AEncoding = integer,

APad = integer,

BEncoding = integer,

BPad = integer);

C Structure

typedef struct {

unsigned short SpanA;

UBYTE ChannelA;

unsigned short SpanB;

UBYTE ChannelB;

UBYTE AEncoding;

UBYTE APad;

UBYTE BEncoding;

UBYTE BPad;

} XL_CrossConnectChannel;

C++ Class

class XLC_CrossConnectChannel : public XLC_OutboundMessage {

public:

unsigned short getSpanA() const;

void setSpanA(unsigned short x);

UBYTE getChannelA() const;

void setChannelA(UBYTE x);

unsigned short getSpanB() const;

void setSpanB(unsigned short x);

UBYTE getChannelB() const;

void setChannelB(UBYTE x);

UBYTE getAEncoding() const;

void setAEncoding(UBYTE x);

UBYTE getAPad() const;

void setAPad(UBYTE x);

UBYTE getBEncoding() const;

void setBEncoding(UBYTE x);

UBYTE getBPad() const;

void setBPad(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 (0x0015) | 1, 2 | Length (0x0007)
3, 4 | Message Type (0x001A) | 3, 4 | Message Type (0x001A)
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)
Number of AEs 0x02
AEs 0x0D Channel A 0x0D Channel B
: | Channel A Encoding Format 0x01 µ-law 0x02 A-law | 10 | Checksum
: | Channel A Pad Value NOTE: This is a blind connection and should only be done with spans and channels out of service. The dB gain/loss adjustment of the signal being transmitted to the appropriate channel: 0x00 +3 dB Gain/Loss 0x01 0 dB 0x02 2 dB 0x03 3 dB 0x04 4 dB 0x05 6 dB 0x06 9 dB
: | Channel B Encoding Format 0x01 µ-law 0x02 A-law
: | Channel B Pad Value NOTE: This is a blind connection and should only be done with spans and channels out of service. The dB gain/loss adjustment of the signal being transmitted to the appropriate channel: 0x00 +3 dB Gain/Loss 0x01 0 dB 0x02 2 dB 0x03 3 dB 0x04 4 dB 0x05 6 dB 0x06 9 dB
: | Checksum

Digital communications link - voice, data, and video at a 1.544 Mbps rate (24 64 Kbps channels)
A digital communications link - voice, data, and video at a 2.048 Mbps rate; 30B/2D or 31B/1D (ISDN); non-North American version of T1.
See Pulse Code Modulation.
See Integrated Services Digital Network.
See Signaling System Number Seven.
Internet Protocol. Part of the TCP/IP family of protocols used to route messages and tracks the addresses of nodes.
A computer, attached to the Excel platform through an RS-232 or Ethernet link, from which you run the telecommunications application that controls the Excel platform.
A group of data bits in a specific format, with a flag at each end to indicate the beginning and the end of the frame.
See Address Information Block.
Most Significant Bit
Least Significant Bit