[YMCS/YDMP Free Trial Program]Yealink would like to offer Free Trial Program of Yealink device management service for our current eligible customers. You can see the details below.
https://www.yealink.com/ydmp-freetrial-2020


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Service unavailable after one second
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Yealink_Michael Offline
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Posts: 382
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Post: #2
RE: Service unavailable after one second
hello

thanks for your information

for your issue, do you mean the scenario like below :

1. A and B all register to the same PBX
2. A call B, after A dial the number of B and then hear a ring back beep , then the LCD of A will show "Service unavailable" and it gives me a busy tone.
3. but if A call B, B answer the call within the time A receive the ring back beep , then A and B can establish a call successfully

please point out if any misunderstanding and then check the below items :

1. upgrade the T48 to the last firmware 35.80.0.70 ,firmware download link :
http://support.yealink.com/attachmentDow...0.0.70.zip

2. reset to factory and test again

if all the above solution can't solve your issue, please provide us the trace file for future analysis,trace file including pcap file, config bin and syslog file , and we need three of them provide at one time.

for how to get them , please refer to the FAQ below:
http://forum.yealink.com/forum/showthread.php?tid=1319

do the above test and send all the trace files to support@yealink.com

6 files totally,
3 files (bin ,syslog,pcap ) when call showing "Service unavailable"
3 files (bin ,syslog,pcap ) when call establish

let me know if any question

TKS & BR

Michael
10-15-2015 05:10 PM
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RE: Service unavailable after one second - Yealink_Michael - 10-15-2015 05:10 PM

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