Testing channels on an E1

[Kaushik Ray]

Hello

We have an E1 configured as follows

controller E1 0/0/0

pri-group timeslots 1-30

interface Serial0/0/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-qsig

isdn protocol-emulate network

isdn incoming-voice voice

isdn send-alerting

no cdp enable

no clns route-cache

Is there any way to test from the router to check if all the channels (30) are actually opened up?

It has been configured for 30 Channels but just to test that whether all are open/

Any advice will be much appreciated.

Thanks

[Suresh Subramanian]

Hello Kaushik,

To find out which channels are in service, which are out of service, use command 'show isdn service'

//Suresh

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[Kaushik Ray]

Thanks Suresh for your reply This is what i see

PRI Channel Statistics:

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

  Configured Isdn Interface (dsl) 0

   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   :  2 0 2 0 0 0 0 0 0 0 2 2 2 2 2 3 2 2 2 2 2 0 0 0 0 0 0 0 0 0 3

   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 2

[Aman Soi]

Hi Ray,

In E1 Voice , you have two 30 timeslots each of 64K.

regds,

aman

[Kaushik Ray]

Thanks Aman

But it is just that I am seeing 2 out of service between 1 -31 whereas I would have expected to see 1 ?

[tonyperla]

Hi,

There are a couple of things you can check.  First, from the ISR you can do a "sh isdn status" and it will show the Layer 1,2,3 status of the ISDN 30.  You can also do a "sh isdn service" this will show you all of the channels on your ISDN 30 and what state they are in.

Hope this helps

Tony

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[Kaushik Ray]

Thanks Tony

below is the output:

sh isdn status
Global ISDN Switchtype = primary-qsig
ISDN Serial0/0/0:15 interface
        ******* Network side configuration *******
        dsl 0, interface ISDN Switchtype = primary-qsig
         **** Master side configuration ****
    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
    Layer 3 Status:
        8 Active Layer 3 Call(s)
        CCB:callid=56B2, sapi=0, ces=0, B-chan=13, calltype=VOICE
        CCB:callid=56B5, sapi=0, ces=0, B-chan=17, calltype=VOICE
        CCB:callid=56B7, sapi=0, ces=0, B-chan=15, calltype=VOICE
        CCB:callid=56C5, sapi=0, ces=0, B-chan=11, calltype=VOICE
        CCB:callid=56C9, sapi=0, ces=0, B-chan=10, calltype=VOICE
        CCB:callid=56CD, sapi=0, ces=0, B-chan=12, calltype=VOICE
        CCB:callid=56CE, sapi=0, ces=0, B-chan=21, calltype=VOICE
        CCB:callid=56D1, sapi=0, ces=0, B-chan=20, calltype=VOICE
        CCB:callid=56D2, sapi=0, ces=0, B-chan=19, calltype=VOICE
    Active dsl 0 CCBs = 9
    The Free Channel Mask:  0xBFE221FF
    Number of L2 Discards = 0, L2 Session ID = 7
    Total Allocated ISDN CCBs = 9

[tonyperla]

So from the output in both of your reply's, it looks like your ISDN 30 is up and running perfectly fine and in fact has 8 calls going over it.  When running the sh isdn service it will show the specific channels being used.  You can also run a sh controllers E1 and it will also show if there are any errors or slips on the interface and/or circuit

Tony

[Kaushik Ray]

Thanks again Tony,  for the sh isdn status how do I know that the 30 channels are up?

[tonyperla]

The best way to look at all 30 would be a sh isdn service.  It will show both the channel state and the service state  -

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

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

[Kaushik Ray]

Thanks again Tony, would you know why under service state channel 6 it shows 2= Out of Service?

[Suresh Subramanian]

Kaushik, That is the signaling channel Serial0/0/0:15 which will always show as 'out of service' under Service State and will show as Reserved under Channel State.

[Kaushik Ray]

Thanks, I thought that E1 had 2 channels for signalling between 0-31 but here it shows 2 channels to be out of service between 1-31. apologies if I am missing something?

[Suresh Subramanian]

that is because you have configured timeslots as 1-30 under the controller configuration. so the last is also OOS.

controller E1 0/0/0

pri-group timeslots 1-30

[Suresh Subramanian]

Please try configuring pri-group timeslots 1-31 instead of 1-30.