[asterisk-users] how to set iaxmodem receiving speed

[Larry Moore]

On 17/05/2012 1:24 AM, Steve Underwood wrote:
> Hi,
>
> On 05/16/2012 09:59 PM, Larry Moore wrote:
>> Read the subject line more closely.
>>
>> Tested receiving too,
>>
>> I set the Send & Receive speed of the receiving analogue modem to 
>> that below, the log file on the sending modem (iaxmodem) reported it 
>> capable of 9600.
>>
>> May 16 21:32:04.28: [ 2335]: REMOTE best rate 9600 bit/s
>> May 16 21:32:04.28: [ 2335]: REMOTE max A3 page width (303 mm)
>> May 16 21:32:04.28: [ 2335]: REMOTE max unlimited page length
>> May 16 21:32:04.28: [ 2335]: REMOTE best vres R16 x 15.4 line/mm
>> May 16 21:32:04.28: [ 2335]: REMOTE format support: MH, MR, MMR
>> May 16 21:32:04.28: [ 2335]: REMOTE supports T.30 Annex A, 256-byte ECM
>> May 16 21:32:04.28: [ 2335]: REMOTE best 0 ms/scanline
>> May 16 21:32:04.28: [ 2335]: USE 9600 bit/s
>>
>> Perhaps the issue is with Hylafax.
>>
>> Setting the Transmit & Receive strings to "!24,48,72,96" seems to 
>> yield the most reliability in transmission
> If you have an ATA in the path that is often the case. Many of them 
> badly mess up a FAX signal. Without such a distortion machine V.17 
> should be fine.

The receiving analogue modem is directly connected to the PSTN network 
and was used to to determine if the reported issue could be reproduced 
on a non-iaxmodem.

My outgoing connections were through an iaxmodem with T.38 gateway 
enabled and disabled, with most successful transmissions being when T.38 
gateway was used.

Larry.