You are here: CSP API Reference > 1 EXS & SwitchKit API Messages > Request For Service 0x0040

Request For Service 0x0040

SwitchKit Name

Request For Service

Type

EXS API and SwitchKit API message

Description

Request For Service 0x0040

This message is sent to the host when an incoming call is detected. Valid host responses to this message include the following:

Connect

Connect With Pad

Connect One-Way Forced

Connect With Data

Connect Wait

Connect to Conference

Connect One-Way to Conference

Park Channel

Sent by

CSP

Resent

This message is resent once after five seconds.

SwitchKit Code

C Structure

typedef struct {

unsigned short Span;

UBYTE Channel;

UBYTE ResendFlag;

} XL_RequestForService;

C++ Class

class XLC_RequestForService : public XLC_OneChannelMessage {

public:

unsigned short getSpan() const;

void setSpan(unsigned short x);

UBYTE getChannel() const;

void setChannel(UBYTE x);

UBYTE getResendFlag() const;

void setResendFlag(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 (0x00NN) | 1, 2 | Length (0x00NN)
3, 4 | Message Type, MSB (0x00) | 3, 4 | Message Type, MSB (0x00)
5 | Reserved (0x00) | 5 | Reserved (0x00)
6 | Sequence Number | 6 | Same Sequence Number
7 | Logical Node ID | 7 | Logical Node ID
8 : | AIB Address Method 0x00 - Individual AEs | 8 | AIB
: | Checksum
Number of AEs to follow |
AE 0x0D Channel
: | Resend Flag 0x00 Request for Service is not a resend 0x01 Request for Service is a resend
: | Checksum

RFS. A Status Message indicating that some entity is requesting service from the Excel platform.
Range of channels provided by T1 or E1 transmission service. A physical span is a group of channels taking up a single physical wire. A logical span is a group of channels taking up less than a single logical wire, or carried over more than one physical wire.
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.
Most Significant Bit
See Address Information Block.
Message delimiter (SS7 bit pattern - 01111110)