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Problem E1 Intermitten

Hi All ,

I have Problem with E1 in Cisco Call Manager  ,  when outgoing call using E1 in phone ,status is always busy 

here is the debug q931

Jan 27 06:04:13.459: ISDN Se0/3/0:15 Q931: TX -> SETUP pd = 8  callref = 0x008B

        Bearer Capability i = 0x8090A3

                Standard = CCITT

                Transfer Capability = Speech 

                Transfer Mode = Circuit

                Transfer Rate = 64 kbit/s

        Channel ID i = 0xA9839F

                Exclusive, Channel 31

        Called Party Number i = 0x80, '081381XXXXX'

                Plan:Unknown, Type:Unknown

*Jan 27 06:04:13.495: ISDN Se0/3/0:15 Q931: RX <- RELEASE_COMP pd = 8  callref = 0x808B

        Cause i = 0x82AC - Requested circuit/channel not available

and when I check debug q921 here is what i got :

*Jan 27 06:02:30.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:31.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:32.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:33.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:34.271: ISDN Se0/3/0:15 Q921: User RX <- RRp sapi=0 tei=0 nr=13

*Jan 27 06:02:34.271: ISDN Se0/3/0:15 Q921: User TX -> RRf sapi=0 tei=0 nr=15

*Jan 27 06:02:34.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:35.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:37.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:38.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:39.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:40.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:41.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:42.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:43.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:44.271: ISDN Se0/3/0:15 Q921: User TX -> RRp sapi=0 tei=0 nr=15

*Jan 27 06:02:44.283: ISDN Se0/3/0:15 Q921: User RX <- RRp sapi=0 tei=0 nr=13

*Jan 27 06:02:44.283: ISDN Se0/3/0:15 Q921: User TX -> RRf sapi=0 tei=0 nr=15

*Jan 27 06:02:44.287: ISDN Se0/3/0:15 Q921: User RX <- RRf sapi=0 tei=0 nr=13

*Jan 27 06:02:44.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:45.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:46.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:47.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

*Jan 27 06:02:48.311: ISDN Se0/3/0:15 Q921: User RX <- SABMEp sapi=0 tei=13

I wonder where is the problem , while my e1 status

ISDN Serial0/3/0:15 interface

        dsl 1, interface ISDN Switchtype = primary-net5

    Layer 1 Status:

        ACTIVE

    Layer 2 Status:

        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

    Layer 3 Status:

        0 Active Layer 3 Call(s)

    Active dsl 1 CCBs = 0

    The Free Channel Mask:  0xFFFF7FFF

    Number of L2 Discards = 0, L2 Session ID = 10

    Total Allocated ISDN CCBs = 0

and E1 is up

anyone kindly help ?

1 ACCEPTED SOLUTION

Accepted Solutions
Silver

Re: Problem E1 Intermitten

Hi,

Believe me it's a provider issue.

Provider sends a RX, 'channel not available'. Provider has to tell you why they send this message. There must be a reason for it. And again, THEY send this message! Not you!

Several years ago I had a similar issue, and customer wanted to throw out Cisco, because provider says they are not blocking channels etc, finally customer wanted to sue provider, and then provider changed some equipment and all was solved.

And 1 year ago, with another customer, same issue. Provider says, they don't block channels, I told my customer, that it is a problem with the provider, and I can do nothing, and it's up to customer and provider.

After a week or so engineer from provider comes on site, does something and viola, it works! (a year without issues now)

Good luck!

Bye,

Jan

26 REPLIES
Cisco Employee

Problem E1 Intermitten

Hello Tommy

what is the status of the CIC? can you paste below below command?

show isdn status

show isdn service

show controllers E1 XXX


Br,
Nadeem 

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Br, Nadeem Please rate all useful post.
New Member

Problem E1 Intermitten

Hi Nadeem

here is the status

show isdn status

Global ISDN Switchtype = primary-net5

ISDN Serial0/3/0:15 interface

        dsl 1, interface ISDN Switchtype = primary-net5

    Layer 1 Status:

        ACTIVE

    Layer 2 Status:

        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

    Layer 3 Status:

        0 Active Layer 3 Call(s)

    Active dsl 1 CCBs = 0

    The Free Channel Mask:  0xFFFF7FFF

    Number of L2 Discards = 0, L2 Session ID = 10

    Total Allocated ISDN CCBs = 0

sh isdn service

PRI Channel Statistics:

ISDN Se0/3/0:15, Channel [1-31]

  Configured Isdn Interface (dsl) 1

   Channel State (0=Idle 1=Proposed 2=Busy 3=Reserved 4=Restart 5=Maint_Pend)

    Channel :  1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

    State   :  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

   Service State (0=Inservice 1=Maint 2=Outofservice 8=MaintPend 9=OOSPend)

    Channel :  1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

    State   :  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

show controllers e1

Applique type is Channelized E1 - balanced

  No alarms detected.

  alarm-trigger is not set

  Version info FPGA Rev: 08121917, FPGA Type: PRK1

  Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.

  International Bit: 1, National Bits: 11111

  Data in current interval (323 seconds elapsed):

     0 Line Code Violations, 43 Path Code Violations

     26 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

     34 Errored Secs, 8 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

  Data in Interval 1:

     0 Line Code Violations, 170 Path Code Violations

     74 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

     101 Errored Secs, 29 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

  Data in Interval 2:

     0 Line Code Violations, 165 Path Code Violations

     74 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

     98 Errored Secs, 27 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

  Data in Interval 3:

     0 Line Code Violations, 168 Path Code Violations

     74 Slip Secs, 1 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

     100 Errored Secs, 29 Bursty Err Secs, 1 Severely Err Secs, 0 Unavail Secs

  Data in Interval 4:

     0 Line Code Violations, 2210 Path Code Violations

     75 Slip Secs, 4 Fr Loss Secs, 0 Line Err Secs, 4 Degraded Mins

     104 Errored Secs, 24 Bursty Err Secs, 4 Severely Err Secs, 0 Unavail Secs

  Data in Interval 5:

     1011 Line Code Violations, 206 Path Code Violations

     65 Slip Secs, 2 Fr Loss Secs, 6 Line Err Secs, 0 Degraded Mins

     97 Errored Secs, 34 Bursty Err Secs, 2 Severely Err Secs, 20 Unavail Secs

  Total Data (last 5 15 minute intervals):

     1011 Line Code Violations, 2919 Path Code Violations,

     362 Slip Secs, 7 Fr Loss Secs, 6 Line Err Secs, 4 Degraded Mins,

     500 Errored Secs, 143 Bursty Err Secs, 7 Severely Err Secs, 20 Unavail Secs

Cisco Employee

Re: Problem E1 Intermitten

one important thing which forgot to mentioned, please check the "encapsulation" should be same on the both side, check framing and clock as well.

interface Serial3/0:15

encapsulation hdlc====it shud be same on both side

Br,
Nadeem 

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Br, Nadeem Please rate all useful post.
VIP Purple

Problem E1 Intermitten

Hi Tommy,

I can see lot of slips and error seconds in E1 controller output.

Please check the clocking [network clock-participate] as suggested by Nadeem as well.

regds,

aman

Cisco Employee

Problem E1 Intermitten

Is it possible to change the cable and check as i can see slips and brust errors on this controllers.


Br,
Nadeem 

Please rate all useful post.

Br, Nadeem Please rate all useful post.
New Member

Problem E1 Intermitten

I have check the encapsulation and framing with telco , framing is no-crc4 and encapsulation hdlc

network clock-participate wic 3 also already been configured ,

but the status is same , is it possible hardware problem ?

VIP Purple

Problem E1 Intermitten

Hi Tommy,

If u have another E1 port available , please check.

what is the router model, show version and show inventory?please share.

regds,

aman

New Member

Problem E1 Intermitten

Hi Amanso,

unfortunately i only have 1 port of E1 ,

router model is 2901

sh version

Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.2(4)M4, RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2013 by Cisco Systems, Inc.

Compiled Thu 20-Jun-13 13:06 by prod_rel_team

sh inven

NAME: "CISCO2911/K9", DESCR: "CISCO2911/K9 chassis, Hw Serial#: FGL1743107Y, Hw Revision: 1.0"

NAME: "2nd generation four port FXO voice interface daughtercard on Slot 0 SubSlot 1", DESCR: "2nd generation four port FXO voice interface daughtercard"

NAME: "2nd generation four port FXO voice interface daughtercard on Slot 0 SubSlot 2", DESCR: "2nd generation four port FXO voice interface daughtercard"

NAME: "VWIC3-1MFT-T1/E1 - 1-Port RJ-48 Multiflex Trunk - T1/E1 on Slot 0 SubSlot 3", DESCR: "VWIC3-1MFT-T1/E1 - 1-Port RJ-48 Multiflex Trunk - T1/E1"

NAME: "PVDM3 DSP DIMM with 128 Channels on Slot 0 SubSlot 4", DESCR: "PVDM3 DSP DIMM with 128 Channels"

NAME: "Network Module Adapter for SM Slot on Slot 1", DESCR: "Network Module Adapter for SM Slot"

NAME: "High Density Analog Voice Network Module on Slot 1", DESCR: "High Density Analog Voice Network Module"

NAME: "2nd generation four port FXO voice interface daughtercard on Slot 1 SubSlot 0", DESCR: "2nd generation four port FXO voice interface daughtercard"

NAME: "2nd generation four port FXO voice interface daughtercard on Slot 1 SubSlot 1", DESCR: "2nd generation four port FXO voice interface daughtercard"

NAME: "Internal Services Module with Services Ready Engine on Slot 0", DESCR: "Internal Services Module with Services Ready Engine"

NAME: "C2911 AC Power Supply", DESCR: "C2911 AC Power Supply"

regards,

Tommy

VIP Purple

Problem E1 Intermitten

Hi Tommy,

please refer the link on similar problem

https://supportforums.cisco.com/message/4002473#4002473

there is a bug

T1 interface behavior inconsistent across WIC Modules

CSCua50697

Symptoms: After unplugging and reconnecting a T1 cable, the T1 controller
remains down or report continuous errors. After a router reload, the T1
controller remains up until the cable is disconnected again.

Conditions: This symptom affects only the following cards: HWIC-xCE1T1-PRI,
NM-8CE1T1-PRI, VWIC3-xMFT-T1/E1, and GRWIC-xCE1T1-PRI.
Also, the T1 signal must be somewhat out-of-specification according to T1.403
standards.

Workaround 1: Reload the router with the T1 cable plugged in.

Workaround 2:
Step 1) Upgrade to a fixed-in Cisco IOS version.
Step 2) Issue the following commands (hidden, so tab complete will not work):

enable
config t
controller ! ( example: controller t1 0/0/0 )
hwic_t1e1 equalize

Step 3) Shut/no shut the T1 controller, or reload the router to allow the CLI to
take effect.

regds,

aman

Problem E1 Intermitten

Hi Tommy.

Can you please post VG config and a show diag?

Thanks

Regards

Carlo

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"The more you help the more you learn"

Please rate all helpful posts "The more you help the more you learn"
New Member

Re: Problem E1 Intermitten

Hi Carlo ,

Attached is the Voice gateway configuration and show diag,

Regards,

Tommy

VIP Purple

Problem E1 Intermitten

Hi Tommy,

can u share the output of show network-clock as well?

regds,

aman

New Member

Problem E1 Intermitten

Hi Aman ,

here is the network clock configuration

Network Clock Configuration

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

    10          Backplane       GOOD            PLL        

  Current Primary Clock Source

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

    10          Backplane       GOOD            PLL        

Regards,

Tommy

VIP Purple

Problem E1 Intermitten

Hi Tommy,

ideally , the output should be somewhat like this

sh network-clocks

  Network Clock Configuration

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

     1          E1 0/3/0        GOOD            E1

    10          Backplane       GOOD            PLL

  Current Primary Clock Source

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

     1          E1 0/3/0        GOOD            E1

it seems that clock is not coming.

can you configure the command network-clock-select 1 E1 0/3/0  and then, share again output?

regds,

aman

Re: Problem E1 Intermitten

Hi Tommy.

On CUCM, try to change b-channel selection to bottom-up

HTH

Regards

Carlo

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"The more you help the more you learn"

Please rate all helpful posts "The more you help the more you learn"
Cisco Employee

Re: Problem E1 Intermitten

Also you can adding one command since this h.323 GW

interface serial XX

isdn nego b-chan

isdn b-chan ascending


Br,
Nadeem 

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Br, Nadeem Please rate all useful post.

Re: Problem E1 Intermitten

Hi Nadeem.

From posted config I see

pri-group timeslots 1-31 service mgcp

So it seems to be MGCP controlled not H323.

Regards

Carlo

Please rate all helpful posts

"The more you help the more you learn"

Please rate all helpful posts "The more you help the more you learn"
Cisco Employee

Re: Problem E1 Intermitten

that's my bad, i thought it was h.323.


Br,
Nadeem 

Please rate all useful post.

Br, Nadeem Please rate all useful post.
New Member

Re: Problem E1 Intermitten

HI Carlo ,

In the CUCM E1 Gateway i have already config channel to bottom-up or top-down but no result ,

but when outgoing E1 never change  channel other than 1 when setting top-down , and never change channel other than 31 when i set bottom-up

i have used command

isdn service b_channel 1 state 2

to force it use another channel , but the outgoing call can not procceed , and in debug isdn q931 not showing anything.

when i change isdn service b_channel 1 state 0 , debug isdn q931 out but showing no requested channel.

best regards,

Tommy

New Member

Re: Problem E1 Intermitten

Hi Nadeem,

I Already enable the network select

Network Clock Configuration

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

     1          E1 0/3/0        GOOD            E1         

    10          Backplane       GOOD            PLL        

  Current Primary Clock Source

  ---------------------------

  Priority      Clock Source    Clock State     Clock Type

     1          E1 0/3/0        GOOD            E1         

but still outgoing status requested circuit/channel not available

regards,

Tommy

Silver

Problem E1 Intermitten

Hi,

You get a RX "Requested circuit/channel not available" after a TX from your side.

I would contact the provider.

If the E1 is MGCP controlled you might try to enable "Inhibit restarts at PRI initialization" (unselect it)

After a reset the CM will request each channel, and the provider should aknowledge this.

I the cases I had this error, it was always a provider issue.

Bye,

Jan

VIP Purple

Re: Problem E1 Intermitten

Hi Tommy,

Is SLIPs and errors problem resolved?

can u run the command show isdn service on router to check the channel status?

regds,

aman

New Member

Re: Problem E1 Intermitten

Hi aman ,

nope the slip error still same , i have replaced the E1 port to another E1 but the result still same .

show isdn service

PRI Channel Statistics:

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 1. Layer 3 output may not apply

ISDN Se0/3/0:15, Channel [1-31]

  Configured Isdn Interface (dsl) 1

   Channel State (0=Idle 1=Proposed 2=Busy 3=Reserved 4=Restart 5=Maint_Pend)

    Channel :  1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

    State   :  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

   Service State (0=Inservice 1=Maint 2=Outofservice 8=MaintPend 9=OOSPend)

    Channel :  1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1

    State   :  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

regards,

Tommy

New Member

Re: Problem E1 Intermitten

Hi Jay,

I have contact the provider , and provider have confirm they have opened the channel from their side.

I have tried "Inhibit restarts at PRI initialization" but the result is still same .

Regards,

Tommy

Silver

Re: Problem E1 Intermitten

Hi,

Believe me it's a provider issue.

Provider sends a RX, 'channel not available'. Provider has to tell you why they send this message. There must be a reason for it. And again, THEY send this message! Not you!

Several years ago I had a similar issue, and customer wanted to throw out Cisco, because provider says they are not blocking channels etc, finally customer wanted to sue provider, and then provider changed some equipment and all was solved.

And 1 year ago, with another customer, same issue. Provider says, they don't block channels, I told my customer, that it is a problem with the provider, and I can do nothing, and it's up to customer and provider.

After a week or so engineer from provider comes on site, does something and viola, it works! (a year without issues now)

Good luck!

Bye,

Jan

VIP Purple

Re: Problem E1 Intermitten

Hi Tommy,

As suggested by Jan , can't you ask Telco to check the E1 link through BERT?

regds,

aman

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