[Asterisk-Users] Re: How is Teliax ?

[Rich Adamson]

asterisk at anime.net wrote:
> Lonnie Abelbeck wrote:
>>  <asterisk <at> anime.net> writes:
>>> On Thu, 30 Mar 2006, Giridhar Reddy Bandi wrote:
>>>> I am looking at purchasing some DID lines from Teliax to install it 
>>>> on my
>>>> asterisk.
>>>> i would like to know some feed back on "Teliax" before i purchase.
>>>> suggest me if there are better sevice providers.
>>> I have had issues with termination on teliax. Callers tell me I sound 
>>> choppy to them. Teliax origination has no problems at all strangely 
>>> enough.
>> If you used SIP instead of IAX2 with Teliax you will have better 
>> quality calls.
>>  The 'choppy' sound occurs with IAX2 and not SIP at Teliax.
>> I can recommend Teliax, but use SIP.
> 
> But I _am_ using SIP. I tried all the various teliax gateways including 
> the beta test ones and had choppiness with all of them.
> 
> As I said before, teliax origination had no choppiness problems at all. 
> Only termination had issues.
> 
> I had no problems - termination or origination - with junction networks, 
> despite the fact they had 3x higher latency than teliax. JN is more 
> expensive than teliax though.
> 
> Also, I have talked to others who had similar choppiness problems with 
> teliax. So it's not just me.

For whatever its worth, the majority of teliax users I'm sure have had 
at least some audio choppiness. Teliax is obviously aware of this since 
they have spent a fair amount of time recently moving/enhancing their 
implementations. It probably has nothing to due with iax vs sip other 
then those around this list know that at least some changes/improvements 
have been also occurring with the iax code.

One other consideration is that its obvious calls are handled in 
different ways depending on the origination and termination points. In 
other words, various npa-nxx calls are handed off to different wholesale 
providers that can also be the source of call quality issues. (I've 
identified some very specific npa's where this happens to be the case.)

There are a couple of other well known itsp's that don't have those 
issues, and its highly likely their implementations in terms of 
wholesale delivery sources are different.

Overall, I'd give teliax folks high marks for paying attention to 
customer service and addressing issues, even though they are very 
closed-mouth about service improvement plans, etc.