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New Member

Configuring an E1 in Nairobi

Hi guys,

I am trying to configure an E1 PRI in Nairobi. TelKom Kenya has proved that the cable and Exchange is good by having an IP Pbx onsite. I am on a CM 7.1(5b)su4. The remote site is on a 3845 GW. The E1 PRI card is VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk - T1/E1. The E1 is configured on 0/0/0. Does anyone have any experience in Nairobi or do you see an issue with my config. I have done atleast 60 E1s around the world and this is the first site I am having an issue thats dragging on. I do have a green light (CD) on the card when the cable is plugged in. Thank you in advance.

network-clock-participate wic 0

network-clock-participate wic 1

network-clock-select 1 E1 0/0/0

network-clock-select 2 E1 0/0/1

!

isdn switch-type primary-net5

!

voice-card 0

no dspfarm

dsp services dspfarm

!

voice service voip

h323

no h225 timeout keepalive

!

voice class codec 1

codec preference 1 g711alaw

codec preference 2 g729r8

codec preference 3 g711ulaw

!

controller E1 0/0/0

framing NO-CRC4

line-termination 75-ohm

pri-group timeslots 1-31

description E1 Telecom Kenya

!

interface Serial0/0/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn incoming-voice voice

no cdp enable

!

voice-port 0/0/0:15

cptone KE

!

Everyone's tags (3)
1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Gold

Configuring an E1 in Nairobi

Then most likely cable is wrong, like using ethernet patch.

11 REPLIES
Hall of Fame Super Gold

Configuring an E1 in Nairobi

Start with "show controllers e1".

Then "show isdn status". Don't exclude telco mistake.

New Member

Configuring an E1 in Nairobi

not sure what you mean? it does show the E1 is down. Mind you I have done quite a few T1s and E1s in my career. I am looking for someone who may have had the same issue in Nairobi and was able to fix it by either changing the model of the E1 card or config.

Hall of Fame Super Gold

Re: Configuring an E1 in Nairobi

E1 down == telco problem. They will swear that is not is not, but that's the same everywhere.

Note: 75ohm termination is correct only if have you coax cable. Otherwise, leave default.

Not sure why you assume its router problem and not telco.

Hall of Fame Super Silver

Configuring an E1 in Nairobi

Controller DOWN could mean L1 issues, replace cable if you have not already tried it. Is the telco smartjack in good state, i.e. no errors, all lights green?

Have them perform loopback check on their equipment.

Chris

New Member

Configuring an E1 in Nairobi

Hi, thanks for the replies. TelKom Kenya were able to prove right to the cable by placing an IP Pabx and bringing up the PRI and placing a call. This is what I have when I do the show commands:

E1 0/0/0 is down.

  Applique type is Channelized E1 - unbalanced

  Cablelength is Unknown

  Description: E1 Telecom Kenya

  Transmitter is sending remote alarm.

  Receiver has loss of signal.

  alarm-trigger is not set

  Version info Firmware: 20100222, FPGA: 13, spm_count = 0

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

  CRC Threshold is 320. Reported from firmware  is 320.

  Data in current interval (388 seconds elapsed):

     0 Line Code Violations, 0 Path Code Violations

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

     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 388 Un

CM69CR01RT#show isdn status

Global ISDN Switchtype = primary-net5

ISDN Serial0/0/0:15 interface

        dsl 0, interface ISDN Switchtype = primary-net5

    Layer 1 Status:

        DEACTIVATED

    Layer 2 Status:

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

    Layer 3 Status:

        0 Active Layer 3 Call(s)

    Active dsl 0 CCBs = 0

    The Free Channel Mask:  0x00000000

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

ISDN Serial0/0/1:15 interface

E1 0/0/0 is down.
  Applique type is Channelized E1 - unbalanced
  Cablelength is Unknown
  Description: E1 Telecom Kenya
  Transmitter is sending remote alarm.
  Receiver has loss of signal.
  alarm-trigger is not set
  Version info Firmware: 20100222, FPGA: 13, spm_count = 0
  Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.
  CRC Threshold is 320. Reported from firmware  is 320.
  Data in current interval (388 seconds elapsed):
     0 Line Code Violations, 0 Path Code Violations
     0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
     0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 388 Un

CM99CR01RT#show isdn status

Global ISDN Switchtype = primary-net5

ISDN Serial0/0/0:15 interface

        dsl 0, interface ISDN Switchtype = primary-net5

    Layer 1 Status:

        DEACTIVATED

    Layer 2 Status:

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

    Layer 3 Status:

        0 Active Layer 3 Call(s)

    Active dsl 0 CCBs = 0

    The Free Channel Mask:  0x00000000

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

ISDN Serial0/0/1:15 interface

Hall of Fame Super Gold

Re: Configuring an E1 in Nairobi

Do you have coax, or UTP cable coming out of telco temination ?

You're set for 75ohm/unbalance/coax. That is the only variable for L1.

Note sometime after they prove it working, it breaks just after.

New Member

Configuring an E1 in Nairobi

it's a UTP cable from the Telcom. I had 75 ohms out but the Telco asked me to add it. I took it off and same issue. thanks.

Hall of Fame Super Gold

Configuring an E1 in Nairobi

Then most likely cable is wrong, like using ethernet patch.

New Member

Configuring an E1 in Nairobi

isdn switch-type primary-net5

Is the isdn switch type correct?

Hall of Fame Super Gold

Configuring an E1 in Nairobi

Chris Tolley wrote:

isdn switch-type primary-net5

Is the isdn switch type correct?

Wrong swtich type doesn't cause controller down!

However, it is right.

New Member

Configuring an E1 in Nairobi

I think you're correct. This could be a cable issue, eventhough it works on an IP Pabx the pins could be incorrect when it's plugged in. I will send the pin configs to the cablers. Thanks for your input

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