[Asterisk-Users] T1 E&M wink issues - bad int'l dial-out and occasional dropped calls

[Richard Lyman]

bill black wrote:

> Anyone have any ideas here?
>
> We are using 8 channels of E&M Wink with a T100P for outgoing LD and 
> incoming tollfree numbers and are apparently connected to a Nortel 
> DMS-250 at the CO.   We are receiving ANI & DNIS just fine and can 
> dial-out domestically with DTMF but have two issues that are still 
> unresolved:
>
> 1) We cannot dial-out internationally with an 011 prefix (or any other 
> prefix that we can think of).  Qwest claims (1) they never get 
> international calls and (2) domestic calls are routed to their LD 
> service as 00001NXXNXXXXXX instead of 1NXXNXXXXXX.   Is some form of 
> prefix/suffix needed for DTMF dialing over an E&M wink channel?  (e.g. 
> something like the *ANI*DNIS* for incoming.) 011 clearly doesn't work 
> as a prefix and Qwest's response has invariably been 'there is 
> something wrong with your PBX' :(   Curiously if we follow an 
> 011+international-number with a * we get a recording that we have not 
> entered sufficient digits to complete the call whereas without the * 
> we just get a congestion beep from the far end.
>
> 2) Once or twice a day the customer is getting calls dropped.  The log 
> shows the following:
>
> Apr 21 13:15:51 VERBOSE[22664]:     -- Hungup 'Zap/7-1'
> Apr 21 13:15:52 VERBOSE[22664]:     -- Starting simple switch on 
> 'Zap/7-1'      Apr 21 13:15:53 WARNING[22664]: getdtmf on channel 7: 
> Operation now in progress
> Apr 21 13:15:53 VERBOSE[22664]:     -- Hungup 'Zap/7-1'
>
> It appears that we see the line go back on-hook, hangup but then see 
> it go off-hook again and treat it as another incoming call that never 
> gets a DTMF input when in fact the call has just been dropped.  We've 
> verified that we are not sharing interrupts, we are on run level 3 
> etc. zttest shows (so far) a minimum of 99.987%.  Can anyone think of 
> what might be causing this or what we could ask Qwest regarding 
> possible diagnostics?
>
> 3) Finally, what level of dropped calls is generally considered 
> acceptable?  Like the dead-pixel issue with LCDs this is pretty 
> subjective but is there an industry number that is typical? (We are 
> presently at ~1% due to this issue.)
>
> Thanks to all for any shared wisdom.  Bill

http://www.qwest.com/largebusiness/products/voice/callingcards/lb_dial_guide.html

based on that info, i'd say you are about to have a very crappy day. <G>