Ascend Archive
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Re: (ASCEND)Help-Connect Speeds-56K
We can't get a 56K modem to connect at any speed. A tech from ASCEND
dialed in from California and got a 48 twice and a 46 once. I think we may
be coming in too hot. The trunk side channelized T1 is set at -1db. Has
anyone had to pad their T1 to get it down to -13db.
When I give my modem an AT &V1 it says the line quality is 127, I
originally thought we had loss somewhere but now it looks as if this might
be echo from it coming in too hot.
Any ideas,
Thanks,
Greg
----------
> From: Dave Van Allen <dave@fast.net>
> To: 'Richard Johnsson' <johnsson@interval.com>; 'Greg Hale'
<webmaster@logantele.com>
> Cc: 'Ascend Users' <ascend-users@bungi.com>
> Subject: RE: (ASCEND)Help-Connect Speeds-56K
> Date: Thursday, June 26, 1997 1:18 PM
>
> 56K isn't illegal, per se. USR's implementation of x2 suffers from
> (simply stated) the ISP end equipment sending to high an output into the
> PSTN, exceeding current FCC and telco spec'd levels for input, when
> connecting at rates above 53K. The USR Total Control therefor limits
> its sending rate to a maximum of 53K. The Rockwell/Lucent spec employs
> a slightly different algorithm for this, and is not affected (at least
> publicly known or advertised) at this time.
>
> See the white papers on both technologies for a more in-depth discussion
> of this, but expect to see the USR limitation removed in the near future
> as the delta to make 56K Vs 53K is negligible and arguably not an issue.
>
> Best regards,
>
> David Van Allen - You Tools Corporation / FASTNET(tm)
> dave@fast.net (610) 289-1100 http://www.fast.net
> FASTNET - PA/NJ/DE Internet Solutions
>
>
> >-----Original Message-----
> >From: Richard Johnsson [SMTP:johnsson@interval.com]
> >Sent: Thursday, June 26, 1997 12:30 PM
> >To: Greg Hale
> >Cc: Ascend Users
> >Subject: Re: (ASCEND)Help-Connect Speeds-56K
> >
> >Currently 56K is illegal. The max you can get within FCC regulations is
> >53K. I've only made a few tests (with a Supra 56K) and the best I have
> >personally seen is 50K on an analog line in the same CO as our PRI; 48K
> >from across town.
> >
> >At 08:37 AM 6/26/97 -0500, Greg Hale wrote:
> >>Mailing list newbie here.
> >>Just wondering if anyone has gotten a 56K connection.
> >>We installed two Max4048's with 56K modems to replace old Multitech
modems.
> >>Connect speeds dropped.
> >>Analog modems gave us many 33,600 and 31,200 connections but now we get
> >>28,800 with a rare 31,200. Yet to see a 33,600. I think this is
normal
> >>from what I've heard.
> >>Modem(AT &V1) reports that line quality on the analogs about 20 while
new
> >>modems 127.
> >>We're bringing in channelized T1's from a Nortel DMS-10 and the codec
or
> >>the trunks must be adding "noise", maybe?.
> >>Have had a few problems with disconnects, especially the USR
Sportsters.
> >>New Hayes and Zoom 56flex modems would not even connect until we gave
the
> >>additional string +ms=11,1 to force them to run at v.34.
> >>
> >>Any help or suggestions or just getting brought up to speed would be
> >>appreciated since I can't find the archive,
> >>Thanks,
> >>Greg Hale
> >>greghale@logantele.com
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> >>
> >>
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