Multichannel HDLC framing/deframing machine

A method for deframing HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said method comprises the steps of:

• (A) receiving an ordered series of eight bit code words from a high speed line;
• (B) selecting a first of the ordered series of eight bit code words as a selected code word;
• (C) selecting as a selected channel a logical channel that corresponds to the selected code word;
• (D) loading a current HDLC state for the selected channel from a corresponding channel table stored in a Memory into a first register wherein:
• the current HDLC state is represented by no more than thirty-two (32) bits;
• (E) loading the selected code word into a second register;
• (F) loading a mask into a third register;
• (G) deframing the selected code word utilizing the current HDLC state resulting in an updated HDLC state;
• (H) selecting a next code word in the ordered series of eight bit code words as the selected code word;
• (I) storing the updated HDLC state in the corresponding channel table;
• and
• (J) repeating steps (C) to (I) as a loop, each repetition of the loop selecting a next of the ordered series of eight bit code words as the selected code word.

A method for framing HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said method comprises the steps of:

• (A) selecting a first of the plurality of high speed Time Division Multiplexed (TDM) channels as a selected channel;
• (B) identifying a corresponding channel table stored in a Memory that corresponds to the selected channel;
• (C) loading a data word into a first register from a buffer pool associated with the corresponding channel table;
• (D) loading a current HDLC state from the corresponding channel table into a second register;
• (E) framing the data word utilizing the current HDLC state resulting in an updated HDLC state and a framed code word;
• (F) mutliplexing the framed code word into a stream of multiplexed code words;
• and
• (G) repeating steps (B) to (F) as a loop, each repetition selecting one of the plurality of high speed Time Division Multiplexed (TDM) channels as the selected channel.

A method for framing HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said method comprises the steps of:

• (A) selecting a first of the plurality of high speed Time Division Multiplexed (TDM) channels as a selected channel;
• (B) identifying a corresponding channel table stored in a Memory that corresponds to the selected channel;
• (C) loading a data word into a first register from a buffer pool associated with the corresponding channel table;
• (D) loading a current HDLC state from the corresponding channel table into a second register;
• (E) loading a mask from the corresponding channel table into a third register;
• (F) framing the data word utilizing the current HDLC state resulting in an updated HDLC state and a framed code word;
• (G) storing the updated HDLC state in the corresponding channel table;
• (H) mutliplexing the framed code word into a stream of multiplexed code words;
• (I) repeating steps (B) to (H), each repetition selecting one of the plurality of high speed Time Division Multiplexed (TDM) channels as the selected channel;
• and
• (J) transmitting the stream of multiplexed code words on a high speed line.

An apparatus for deframing HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said apparatus comprising:

• (A) a Memory;
• (B) means for receiving an ordered series of fixed length code words;
• (C) means for selecting a first of the ordered series of fixed length code words as a selected code word;
• (D) means for selecting as a selected channel a logical channel that corresponds to the selected code word;
• (E) means for loading a current HDLC state for the selected channel from a corresponding channel table stored in the Memory into a first register;
• (F) means for deframing the selected code word utilizing the current HDLC state resulting in an updated HDLC state;
• (G) means for selecting a next code word in the ordered series of fixed length code words as the selected code word;
• and
• (H) means for repeating means (D) to (G) as a loop, each repetition of the loop selecting a next of the ordered series of fixed length code words as the selected code word.

An apparatus for deframing HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said apparatus comprising:

• (A) a Memory;
• (B) means for receiving an ordered series of eight bit code words from a high speed line;
• (C) means for selecting a first of the ordered series of eight bit code words as a selected code word;
• (D) means for selecting as a selected channel a logical channel that corresponds to the selected code word;
• (E) means for loading a current HDLC state for the selected channel from a corresponding channel table stored in the Memory into a first register wherein:
• the current HDLC state is represented by no more than thirty-two (32) bits;
• (F) means for loading the selected code word into a second register;
• (G) means for loading a mask into a third register;
• (H) means for deframing the selected code word utilizing the current HDLC state resulting in an updated HDLC state;
• (I) means for selecting a next code word in the ordered series of eight bit code words as the selected code word;
• (J) means for storing the updated HDLC state in the corresponding channel table;
• and
• (K) means for repeating means (D) to (J) as a loop, each repetition of the loop selecting a next of the ordered series of eight bit code words as the selected code word.

An apparatus for flaming HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said apparatus comprising:

• (A) a Memory;
• (B) means for selecting a first of the plurality of high speed Time Division Multiplexed (TDM) channels as a selected channel;
• (C) means for identifying a corresponding channel table stored in the Memory that corresponds to the selected channel;
• (D) means for loading a data word into a first register from a buffer pool associated with the corresponding channel table;
• (E) means for loading a current HDLC state from the corresponding channel table into a second register;
• (F) means for framing the data word utilizing the current HDLC state resulting in an updated HDLC state and a framed code word;
• (G) means for mutliplexing the framed code word into a stream of multiplexed code words;
• and
• (H) means for repeating means (C) to (G) as a loop, each repetition selecting one of the plurality of high speed Time Division Multiplexed (TDM) channels as the selected channel.

An apparatus for framing HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said apparatus comprising:

• (A) a Memory;
• (B) means for selecting a first of the plurality of high speed Time Division Multiplexed (TDM) channels as a selected channel;
• (C) means for identifying a corresponding channel table stored in the Memory that corresponds to the selected channel;
• (D) means for loading a data word into a first register from a buffer pool associated with the corresponding channel table;
• (E) means for loading a current HDLC state from the corresponding channel table into a second register;
• (F) means for loading a mask from the corresponding channel table into a third register;
• (G) means for framing the data word utilizing the current HDLC state resulting in an updated HDLC state and a framed code word;
• (H) means for storing the updated HDLC state in the corresponding channel table;
• (I) means for mutliplexing the framed code word into a stream of multiplexed code words;
• (J) means for repeating means (C) to (I), each repetition selecting one of the plurality of high speed Time Division Multiplexed (TDM) channels as the selected channel;
• and
• (K) means for transmitting the stream of multiplexed code words on a high speed line.

An apparatus for deframing HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said apparatus comprising:

• (A) a Memory;
• (B) electronic circuitry for receiving an ordered series of fixed length code words;
• (C) electronic circuitry for selecting a first of the ordered series of fixed length code words as a selected code word;
• (D) electronic circuitry for selecting as a selected channel a logical channel that corresponds to the selected code word;
• (E) electronic circuitry for loading a current HDLC state for the selected channel from a corresponding channel table stored in the Memory into a first register;
• (F) electronic circuitry for deframing the selected code word utilizing the current HDLC state resulting in an updated HDLC state;
• (G) electronic circuitry for selecting a next code word in the ordered series of fixed length code words as the selected code word;
• and
• (H) electronic circuitry for repeatedly activating circuitry (D) to (G) as a loop, each repetition of the loop selecting a next of the ordered series of fixed length code words as the selected code word.

An apparatus for flaming HDLC data mutliplexed onto a plurality of high speed Time Division Multiplexed (TDM) channels, said apparatus comprising:

• (A) a Memory;
• (B) electronic circuitry for selecting a first of the plurality of high speed Time Division Multiplexed (TDM) channels as a selected channel;
• (C) electronic circuitry for identifying a corresponding channel table stored in the Memory that corresponds to the selected channel;
• (D) electronic circuitry for loading a data word into a first register from a buffer pool associated with the corresponding channel table;
• (E) electronic circuitry for loading a current HDLC state from the corresponding channel table into a second register;
• (F) electronic circuitry for framing the data word utilizing the current HDLC state resulting in an updated HDLC state and a framed code word;
• (G) electronic circuitry for mutliplexing the framed code word into a stream of multiplexed code words;
• and
• (H) electronic circuitry for repeated activating circuitry (C) to (G) as a loop, each repetition selecting one of the plurality of high speed Time Division Multiplexed (TDM) channels as the selected channel.