361 reputation
15
bio website sruffell.net
location Huntsville, AL
age
visits member for 3 years, 11 months
seen Dec 10 at 20:22

I am a Linux Kernel Developer who primarily works on the Digium Asterisk Hardware Device Interface (DAHDI).


Sep
24
awarded  Autobiographer
Dec
17
comment What is the use of echo canceler in ISDN boards if all my endpoints have echo canceling?
Heh, thanks, you're right, I should have said "not need". But I also think you mean to say "...from the far end..." as opposed to "...for the far end...".
Dec
16
answered What is the use of echo canceler in ISDN boards if all my endpoints have echo canceling?
Oct
15
awarded  Yearling
Sep
21
comment Timing Source on Asterisk
I'm busted. :) Although a question about timing came up on the Asterisk mailing list which could help if someone comes across question in the future: article.gmane.org/gmane.comp.telephony.pbx.asterisk.user/271494
Aug
26
comment Timing Source on Asterisk
This is answer is slightly out of date. dahdi_dummy has been deprecated since dahdi-linux 2.3.0. The core of dahdi will now always provide the best source of timing it can. If there is a telephony card available, it will sync the timers to the clock on the card. If one is not available DAHDI will automatically use kernel timers without requiring the 'dummy' span driver. So basically as long as DAHDI is loaded, it will do the right thing with respect to timing.
May
21
comment Is It a Bad Idea to Install the OS GUI on a Server That Will Host Asterisk?
Right, and many Zaptel cards, in order to minimize the amount of latency they introduce into conversations are designed to service their interrupts at 1 ms intervals. Many video drivers run processing with interrupts locked for longer than 1ms, which can cause issues with the audio.
May
20
answered Is It a Bad Idea to Install the OS GUI on a Server That Will Host Asterisk?
May
6
comment Server Freeze Up Under Load
Did you find any new clues?
May
2
answered Server Freeze Up Under Load
Jan
3
awarded  Nice Answer
Jan
2
awarded  Supporter
Jan
2
awarded  Editor
Jan
2
revised Can you please explain the difference between PBX and soft switch in less technical terms?
added 72 characters in body
Jan
2
comment Can you please explain the difference between PBX and soft switch in less technical terms?
Like dkweibe commented on the other answer to your question, if you're using SIP trunking, and all your handsets or endpoints are IP based (sip hard phones, soft phones, etc..) you wouldn't need any telephony specific hardware. You would only need all the same networking hardware / components you're probably already familiar with.
Jan
2
awarded  Teacher
Jan
2
answered Can you please explain the difference between PBX and soft switch in less technical terms?