1993-08-13 - Secure voice software issues

Header Data

From: karn@qualcomm.com (Phil Karn)
To: eb@srlr14.sr.hp.com
Message Hash: ec15db097cf06701651d1e6f7852c42c36f4692b7d442fc4ab84e066bf340c3d
Message ID: <9308132119.AA21953@servo>
Reply To: <9308132028.AA17610@srlr14.sr.hp.com>
UTC Datetime: 1993-08-13 21:23:00 UTC
Raw Date: Fri, 13 Aug 93 14:23:00 PDT

Raw message

From: karn@qualcomm.com (Phil Karn)
Date: Fri, 13 Aug 93 14:23:00 PDT
To: eb@srlr14.sr.hp.com
Subject: Secure voice software issues
In-Reply-To: <9308132028.AA17610@srlr14.sr.hp.com>
Message-ID: <9308132119.AA21953@servo>
MIME-Version: 1.0
Content-Type: text/plain


>This is why you'd really want to run your modems synchronously.  You'd
>just send HDLC frames that encapsulated IP packets (fragmentation may
>be required).  This is how most IP routers work over serial links.

Indeed. And because LAPM uses HDLC framing over the modem, you could
be completely compatible with a regular (asynch DTE interface) V.42bis
modem on the other end of the call. But by implementing V.42bis
yourself, you would have complete control over when frames get sent,
and how large they are.

Phil






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