You are here: CSP API Reference > 1 EXS & SwitchKit API Messages > PCM Encoding Format Configure 0x00D9
PCM Encoding Format Configure 0x00D9
SwitchKit Name
PCMEncodingConfig
Type
EXS API and SwitchKit API message
Description
This message allows the host to set the PCM encoding format of a channel to A-law or µ-law on T1 or E1 spans.
If an A-law encoded channel is connected to a µ-law encoded channel, the Excel platform performs the necessary conversion between the two channels to allow the appropriate voice data to be transmitted to both listeners.
Channels on E1 line cards default to A-law encoded format.
When you configure SS7 with an ANSI stack over an E1 Card, you must send the PCM Encoding Format Configure message with the PCM encoding format set to A-law after you send the SS7 Signaling Stack Configure (0x5C) message. The SS7 Signaling Stack Configure message overwrites the PCM Encoding Format Configure message.
Channels on T1 line cards default to µ-law encoded format.
When you configure SS7 with an ITU stack over a T1 Card or you configure Euro-ISDN over T-1, you must send the PCM Encoding Format Configure message with the PCM encoding format set to µ-law after you send the SS7 Signaling Stack Configure or the ISDN Interface Configure (0x60) messages. The ISDN Interface Configure message overwrites the PCM Encoding Format Configure message.
Occasionally, as in the case of a raw 8-bit data pipe connection, encoding conversion must be disabled. To do so, use this message to set both sides of the connection to the same PCM encoding format and no conversion will be performed.
Sent by
SwitchKit Code
Configuration
PCMEncodingConfig (
Node = integer,
Range = StartSpan:StartChan - EndSpan:EndChan,
Format = integer);
C Structure
typedef struct {
unsigned short StartSpan;
UBYTE StartChannel;
unsigned short EndSpan;
UBYTE EndChannel;
UBYTE Format;
} XL_PCMEncodingConfig;
C++ Class
class XLC_PCMEncodingConfig : public XLC_ChanRangeMessage {
public:
unsigned short getStartSpan() const;
void setStartSpan(unsigned short x);
UBYTE getStartChannel() const;
void setStartChannel(UBYTE x);
unsigned short getEndSpan() const;
void setEndSpan(unsigned short x);
UBYTE getEndChannel() const;
void setEndChannel(UBYTE x);
UBYTE getFormat() const;
void setFormat(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 (0x00D9) |
3, 4 |
Message Type (0x00D9) |
5 |
Reserved (0x00) |
5 |
Reserved (0x00) |
6 |
Sequence Number |
6 |
Same Sequence Number |
7 |
Logical Node ID |
7 |
Logical Node ID |
: |
Address Method 0x00 - Individual Method |
8, 9 |
|
10 |
Checksum |
||
Number of AEs to follow |
|||
AEs 0x0D Channel (Starting) 0x0D Channel (Ending) |
|||
: |
Format 0x01 µ-law encoded PCM (North America & Japan) 0x02 A-law encoded PCM (Europe) |
||
: |
Checksum |