[asterisk-users] Asterisk Vs FreeSWITCH for Fax

2012-05-03 Thread Anita Hall
Hi

We are using Spandsp + FreeSWITCH for receiving Fax over T.30 E1/PRI and
the results make us sad :(

I suppose Asterisk also has the option of using spandsp or a commercial
version from Commetrex. What are your experiences with receiving Fax on
spandsp or commetrex on Asterisk ?

Does it really matter whether I use Asterisk or FreeSWITCH ?

regards,
Anita
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[asterisk-users] T.30 Fax and Echo Cancelation

2012-04-13 Thread Anita Hall
Hi

I know that all echo cancelers are supposed to shut down when they hear the
CNG or CED fax tone. Is this always a good thing ? I know that T.30 is
supposed to be half duplex, so echo should not be there but in my session
recordings, I have seen both sides trying to send at the same time (is that
a sign of some other bad thing?)

What if my T.30 fax is failing due to echo ?

Check out this article
http://connectedplanetonline.com/mag/telecom_oil_water_fax/


regards,
Anita
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[asterisk-users] Combining multiple SIP providers

2012-04-09 Thread Anita Hall
Hi

What is the best way to combine multiple SIP providers to achieve

1) Higher concurrency (for eg. 2 providers with 50 concurrent calling
limits could be combined to give a limit of 100)
2) Redundancy (use another if one is down)

I have a feeling that this will need some SIP Proxy like OpenSIPS but what
could be the architecture ?

Much thanks!

regards,
Anita
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[asterisk-users] fax tone testing

2012-04-02 Thread Anita Hall
Hi

I suspect that my telco set-up is acting funny and I want to use spectral
analysis to confirm the culprit :)

What is the best way to generate Fax tones from a dialplan and then record
them at the other end? Also, where can I get a list of the all the tones
and duration which are used in Fax.


Thanks.


regards,
Anita
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[asterisk-users] Best Way to Send Fax on Sangoma ?

2012-03-27 Thread Anita Hall
Hi

What should be the optimal settings for HWEC related parameters in
wanpipe1.conf to be able to receive Fax over T.30 on a Sangoma A108DE Card ?

In particular, should I enable echo ? If yes, to what parameter ? What
other values like RXGAIN, TXGAIN should I tune ?

TDMV_HW_DTMF
= YES   # YES: receive dtmf events from hardware
TDMV_HW_FAX_DETECT  = YES   # YES: receive fax 1100hz
events from hardware
HWEC_OPERATION_MODE   = OCT_NORMAL# OCT_NORMAL: echo
cancelation enabled with nlp (default)

# OCT_SPEECH: improves software tone detection by disabling NLP (echo
possible)

# OCT_NO_ECHO:disables echo cancelation but allows VQE/tone functions.
HWEC_DTMF_REMOVAL   = NO# NO: default  YES: remove dtmf out
of incoming media (must have hwdtmf enabled)
HWEC_NOISE_REDUCTION   = NO# NO: default  YES: reduces noise on
the line - could break fax
HWEC_ACUSTIC_ECHO = NO# NO: default  YES: enables
acustic echo cancelation
HWEC_NLP_DISABLE= NO# NO: default  YES: guarantees
software tone detection (possible echo)
HWEC_TX_AUTO_GAIN = 0 # 0: disable   -40-0: default tx
audio level to be maintained (-20 default)
HWEC_RX_AUTO_GAIN = 0 # 0: disable   -40-0: default tx
audio level to be maintained (-20 default)
HWEC_TX_GAIN= 0 # 0: disable
-24-24: db values to be applied to tx signal
HWEC_RX_GAIN= 0 # 0: disable
-24-24: db values to be applied to tx signal


regards,
Anita
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[asterisk-users] ph_tor3_e1.c

2012-03-01 Thread Anita Hall
We are  running FreeTDM on a very cheap Atcom card, which used another
module ph_tor3_e1 on top of Dahdi. I believe this is derived from Torrenta.
http://www.atcom.cn/downloads/TelephonyCard/drivers/AX-4ET/E1/ph_tor3_e1.c

On Ubuntu 10.04 this gives problem as the module ph_tor3_e1 (and hence
dahdi) does not unload. Sometimes the machine hangs and needs to be
rebooted.

This module has not been updated for the last 2 years during which the
linux kernel has changed (I am told).

Is there any other manufacturer of torrent card who would be using the same
architecture and keeping his drivers updated ?

If not, what steps do I need to take to update this driver to kernel
version 2.6.32-37-server ?

These are new waters and I feel so helpless :)

regards,
Anita

regards,
Anita
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[asterisk-users] Sangoma A108 PCIe 2.0

2010-09-17 Thread Anita Hall
Hi

Does Sangoma 8-port card A108 support PCIe version 2.0 ?

The cards is here

And we want to use 3 such cards in this motherboard because it has 3 PCIe
slots of version 2.0

http://www.intel.com/products/desktop/motherboards/DX58SO/DX58SO-overview.htm

Is this a good idea ? Do you have any experience with multiple A108 with
PCIe on the same motherboard that supports PCIe 2.0 ?

Any comments will be helpful.

Thanks,
Anita Hall
Simmortel Voice.
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[asterisk-users] Sangoma A108 PCIe V2.0

2010-09-17 Thread Anita Hall
Hi

Does Sangoma 8-port card A108 support PCIe version 2.0 ?

The card is here
http://www.sangoma.com/products/hardware_products/digital_voice_and_data_networking/a108.html

And we want to use 3 such cards in this motherboard because it has 3 PCIe
slots of version 2.0

http://www.intel.com/products/desktop/motherboards/DX58SO/DX58SO-overview.htm

Is this a good idea ? Do you have any experience with multiple A108 with
PCIe on the same motherboard that supports PCIe 2.0 ?

Any comments will be helpful.

Thanks,
Anita Hall
Simmortel Voice.
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[asterisk-users] Synway cards

2010-09-12 Thread Anita Hall
Hi

Does anyone have experience with Synway cards like SHD-240D-CT/PCI with
asterisk and SynAst driver ?
Are they any good ?
Do they really run on Asterisk ?

Thanks.

Anita Hall,
Simmortel Voice
www.simmortel.com
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[asterisk-users] 3G-324M Open Source

2010-07-28 Thread Anita Hall
Hi

We need to evaluate some open source project that supports 3G-324M on top of
Asterisk.

What do you recommend ? What has been your experience ?

Thanks.

regards,
Anita Hall,
Simmortel.
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[asterisk-users] Video IVR Asterisk ?

2010-07-16 Thread Anita Hall
Hi

Is it possible to receive video calls using Asterisk and then process them
as an IVR ? One of our clients wants to set-up a video IVR system in the US
and we are evaluation possible options.

Also, what is the bandwidth of receiving a video call in US ? What protocols
and codecs are supported and does it work on DID numbers ? Can I rent a
hosted solution for this ?

Thanks in anticipation of your valuable inputs.

regards,

Anita Hall,
Simmortel.
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[asterisk-users] E3 Card on Asterisk ?

2010-04-27 Thread Anita Hall
Hi

Please check out this product

http://www.sangoma.com/products/hardware_products/data_networking/a301.html

Does it work on Asterisk or Freeswitch ?
Do Telcos provide an E3 connection ?

One of our customers had an inquiry for terminating 6000 calls
simultaneously. I want to do some homework before taking it further with
him. If I use E1 lines, I will need 6000 / 30 = 200 E1 lines, which does not
look feasible ?

Thanks for any input you may provide.

regards,

Anita Hall,
Simmortel Voice.
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