asked on

HDLC-like framing methods

Hi

I need a HDLC-like framing method with following features:
1) HDLC-based, i.e. compatible with HDLC standard:)
2) Multiplexing - supports parametrized number (up to 65536) of logical channels
3) As few number of extended unneed information (e.g. Packet-Type), as it's possible

I think, there are some HDLC implementations (cisco, 3com, infineon) having these features. It's better to use already developed framing method, than to create a new one.

Please help me to find relevant framing methods and, if possible, implementing source codes, and to compare them.

Steve Jennings

What are you carrying? Voice - data - both? . . . kind of a strange question. I mean . . . what kind of layer 2 protocol CAN'T be muxed? 65536 channels is a BOAT LOAD of channels . . . how large a stream are you looking to transport?

Steve

d-lay

ASKER

Hi Steve, thanks for your comment.

You're right. I poorly understood my problem before posting question.
The protocol i'm looking for is HDLC-based data transfer protocol, with a bit number of channels (65536 channels must be supported by higher layers, so it's not my problem).
IMHO V.42 is good enough to meet these requirements. It has 6 (up to 13) bits for DLCI. Some of DLCI values are reserved by recommendation.
Can I use reserved values for numbering channels, if I want to keep compatibility with V.42?

Would you help me to get free source code that implements V.42, or PPP or Frame Relay?

Thank you.

ASKER CERTIFIED SOLUTION

mikecr

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial