E1 Time Slip Problem

Asterisk Asterisk Hardware
1

Hi all,

We have two E1 voip (asterisk) gateway machines using 3x openvox D410E board each.
Our ISP provider is complaining that we are having Bit Slips.

For example:
Span 1: TE4/0/1 “T4XXP (PCI) Card 0 Span 1” CCS/HDB3/CRC4 ClockSource
E-bit error count: 4

   1 TE4/0/1/1 Clear (In use) (EC: MG2 - INACTIVE)
   2 TE4/0/1/2 Clear (In use) (EC: MG2 - INACTIVE)
   3 TE4/0/1/3 Clear (In use) (EC: MG2 - INACTIVE)
   4 TE4/0/1/4 Clear (In use) (EC: MG2 - INACTIVE)
   5 TE4/0/1/5 Clear (In use) (EC: MG2 - INACTIVE)
   6 TE4/0/1/6 Clear (In use) (EC: MG2 - INACTIVE)
   7 TE4/0/1/7 Clear (In use) (EC: MG2 - INACTIVE)
   8 TE4/0/1/8 Clear (In use) (EC: MG2 - INACTIVE)
   9 TE4/0/1/9 Clear (In use) (EC: MG2 - INACTIVE)
  10 TE4/0/1/10 Clear (In use) (EC: MG2 - INACTIVE)
  11 TE4/0/1/11 Clear (In use) (EC: MG2 - INACTIVE)
  12 TE4/0/1/12 Clear (In use) (EC: MG2 - INACTIVE)
  13 TE4/0/1/13 Clear (In use) (EC: MG2 - INACTIVE)
  14 TE4/0/1/14 Clear (In use) (EC: MG2 - INACTIVE)
  15 TE4/0/1/15 Clear (In use) (EC: MG2 - INACTIVE)
  16 TE4/0/1/16 HDLCFCS (In use)
  17 TE4/0/1/17 Clear (In use) (EC: MG2 - INACTIVE)
  18 TE4/0/1/18 Clear (In use) (EC: MG2 - INACTIVE)
  19 TE4/0/1/19 Clear (In use) (EC: MG2 - INACTIVE)
  20 TE4/0/1/20 Clear (In use) (EC: MG2 - INACTIVE)
  21 TE4/0/1/21 Clear (In use) (EC: MG2 - INACTIVE)
  22 TE4/0/1/22 Clear (In use) (EC: MG2 - INACTIVE)
  23 TE4/0/1/23 Clear (In use) (EC: MG2 - INACTIVE)
  24 TE4/0/1/24 Clear (In use) (EC: MG2 - INACTIVE)
  25 TE4/0/1/25 Clear (In use) (EC: MG2 - INACTIVE)
  26 TE4/0/1/26 Clear (In use) (EC: MG2 - INACTIVE)
  27 TE4/0/1/27 Clear (In use) (EC: MG2 - INACTIVE)
  28 TE4/0/1/28 Clear (In use) (EC: MG2 - INACTIVE)
  29 TE4/0/1/29 Clear (In use) (EC: MG2 - INACTIVE)
  30 TE4/0/1/30 Clear (In use) (EC: MG2 - INACTIVE)
  31 TE4/0/1/31 Clear (In use) (EC: MG2 - INACTIVE)

……

Span 12: TE4/2/4 “T4XXP (PCI) Card 2 Span 4” CCS/HDB3/CRC4
Timing slips: 27

 342 TE4/2/4/1 Clear (In use) (EC: MG2 - INACTIVE)
 343 TE4/2/4/2 Clear (In use) (EC: MG2 - INACTIVE)
 344 TE4/2/4/3 Clear (In use) (EC: MG2 - INACTIVE)
 345 TE4/2/4/4 Clear (In use) (EC: MG2 - INACTIVE)
 346 TE4/2/4/5 Clear (In use) (EC: MG2 - INACTIVE)
 347 TE4/2/4/6 Clear (In use) (EC: MG2 - INACTIVE)
 348 TE4/2/4/7 Clear (In use) (EC: MG2 - INACTIVE)
 349 TE4/2/4/8 Clear (In use) (EC: MG2 - INACTIVE)
 350 TE4/2/4/9 Clear (In use) (EC: MG2 - INACTIVE)
 351 TE4/2/4/10 Clear (In use) (EC: MG2 - INACTIVE)
 352 TE4/2/4/11 Clear (In use) (EC: MG2 - INACTIVE)
 353 TE4/2/4/12 Clear (In use) (EC: MG2 - INACTIVE)
 354 TE4/2/4/13 Clear (In use) (EC: MG2 - INACTIVE)
 355 TE4/2/4/14 Clear (In use) (EC: MG2 - INACTIVE)
 356 TE4/2/4/15 Clear (In use) (EC: MG2 - INACTIVE)
 357 TE4/2/4/16 HDLCFCS (In use)
 358 TE4/2/4/17 Clear (In use) (EC: MG2 - INACTIVE)
 359 TE4/2/4/18 Clear (In use) (EC: MG2 - INACTIVE)
 360 TE4/2/4/19 Clear (In use) (EC: MG2 - INACTIVE)
 361 TE4/2/4/20 Clear (In use) (EC: MG2 - INACTIVE)
 362 TE4/2/4/21 Clear (In use) (EC: MG2 - INACTIVE)
 363 TE4/2/4/22 Clear (In use) (EC: MG2 - INACTIVE)
 364 TE4/2/4/23 Clear (In use) (EC: MG2 - INACTIVE)
 365 TE4/2/4/24 Clear (In use) (EC: MG2 - INACTIVE)
 366 TE4/2/4/25 Clear (In use) (EC: MG2 - INACTIVE)
 367 TE4/2/4/26 Clear (In use) (EC: MG2 - INACTIVE)
 368 TE4/2/4/27 Clear (In use) (EC: MG2 - INACTIVE)
 369 TE4/2/4/28 Clear (In use) (EC: MG2 - INACTIVE)
 370 TE4/2/4/29 Clear (In use) (EC: MG2 - INACTIVE)
 371 TE4/2/4/30 Clear (In use) (EC: MG2 - INACTIVE)
 372 TE4/2/4/31 Clear (In use) (EC: MG2 - INACTIVE)

This is happening in several spans.

We run a timing test:

asterisk -rx “timing test”
Attempting to test a timer with 50 ticks per second.
Using the ‘DAHDI’ timing module for this test.
It has been 1019 milliseconds, and we got 51 timer ticks

asterisk -rx “module show” | grep timing
res_timing_dahdi.so DAHDI Timing Interface 36

We are supposed to receive the timing from our ISP:

“# Span 1: TE4/0/1 “T4XXP (PCI) Card 0 Span 1” CCS/HDB3/CRC4 ClockSource”
“span=1,1,0,ccs,hdb3,crc4”
“# termtype: te”
“bchan=1-15,17-31”
“dchan=16”
“echocanceller=mg2,1-15,17-31”

we have unloaded this modules:

noload=res_timing_pthread.so
noload=res_timing_timerfd.so

Can you help us to test this and validate the problem? And if ours help to solve this?

This is very urgent and we need your support.

Thank you in advance for your help!

2

You need to contact OpenVox about this.

3

Hi david551,

I have already open a ticket towards them but at this time they are out of business ours, and perhaps someone from here could have any idea on how to test.

Thanks,

Alexandre Cardoso

4

Hi,

OpenVox is already checking, may I ask you if each E1 card should have synchronization towards TDM Line?
Do you know if we can have 1 on each card?

I ask this because the card we have that receives the time from E1 Line no span have Time Slip and the other card have time slips.

Thanks
Alex

5

In general, not just for Asterisk, the public network operator is always the timing source, where one end connects to them.

6

So can you please tell me if I have the right configuration to receive the time from ISP:

Span 1: TE4/0/1 “T4XXP (PCI) Card 0 Span 1” CCS/HDB3/CRC4 ClockSource

span=1,1,0,ccs,hdb3,crc4

termtype: te

bchan=1-15,17-31
dchan=16

Span 2: TE4/0/2 “T4XXP (PCI) Card 0 Span 2” (MASTER) CCS/HDB3/CRC4

span=2,2,0,ccs,hdb3,crc4

termtype: te

bchan=32-46,48-62
dchan=47

Span 3: TE4/0/3 “T4XXP (PCI) Card 0 Span 3” CCS/HDB3/CRC4

span=3,3,0,ccs,hdb3,crc4

termtype: te

bchan=63-77,79-93
dchan=78

Span 4: TE4/0/4 “T4XXP (PCI) Card 0 Span 4” CCS/HDB3/CRC4 YELLOW RED

span=4,4,0,ccs,hdb3,crc4

termtype: te

bchan=94-108,110-124
dchan=109

another card:

Span 9: TE4/2/1 “T4XXP (PCI) Card 2 Span 1”

span=9,9,0,ccs,hdb3,crc4

termtype: te

bchan=249-263,265-279
dchan=264

Span 10: TE4/2/2 “T4XXP (PCI) Card 2 Span 2”

span=10,10,0,ccs,hdb3,crc4

termtype: te

bchan=280-294,296-310
dchan=295

Span 11: TE4/2/3 “T4XXP (PCI) Card 2 Span 3”

span=11,11,0,ccs,hdb3,crc4

termtype: te

bchan=311-325,327-341
dchan=326

Span 12: TE4/2/4 “T4XXP (PCI) Card 2 Span 4”

span=12,12,0,ccs,hdb3,crc4

termtype: te

bchan=342-356,358-372
dchan=357

So my question is should card 9 be also the lead to receive the timer from the ISP and synchronize the card?

Thanks in advance
Alex

7

Also the Time slips happens only on card 2 and not on card 0

Thanks
Alex

8

Hi,

I believe I found the issue, the second card was not having the master clock, I’ve configure the time on 2nd card as on the first and no more time slips

Thanks
Alex