Re: [Iptel] comments on draft-ietf-iptel-tgrep-01.txt

[Michael Hammer <mhammer@cisco.com>]

Bob,

Reference the 1010288:

101 is a dialing prefix indicating that the following is a carrier
code,
0288 is the 4-digit carrier code.

In a sense the 0 before 288 could be considered padding to get to the
fixed length 4 digit code.

Mike


At 11:18 PM 6/25/2003 -0700, Manjunath Bangalore wrote:
> Hi Bob,
>
> Appreciate your comments about the TGREP draft.
> I had a clarification about this one comment of yours.
>
> > Section 3.6.1: The carrier length should be variable. The carrier is
> usually
> > derived from dialed digits, thus deployments will likely use the
> carrier
> > codes used in dialing as TGREP carriers to avoid the additional
> overhead of
> > mapping dialed carrier codes to TGREP carrier codes. The US uses
> 5-digit
> > carrier codes in dialing (e.g. 10288 for AT&T as in 1010288). Is
> it to be
> > assumed that for country code of less than three digits that the
> 3-octet
> > country-code is padded with NULL bytes?
>
> Yes, country codes less than three digits should be padded with NULL
> bytes, and
> this will be specified in the next revision. Given that, would you think
> there
> is reason to make the Carrier code to be variable-length?
> Also, for padding ASCII strings, is it common practice to use the
> "NULL" or the
> "blank" character?
>
> Thanks,
> -Manjax
>
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