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New Member

ISDN Layer 1 shutdown on Channelized E1

                   Hello,

I have a problem on a customer site.

He had a E1/PRI trunk on an Alcatel PABX.

I just installed a Cisco 2921, with the same conf as another site I have deployed.

When I connect the E1 on the 2921, layer 1 doesn't go up, even with a CUCM MGCP config (with is a copy/paste of the another site too).

If i try a show isdn status I obtain the following message :

GW-2921-***#show isdn status                                  
Global ISDN Switchtype = primary-net5

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

ISDN Serial0/0/0:15 interface
dsl 0, interface ISDN Switchtype = primary-net5
L2 Protocol = Q.921 0x0000  L3 Protocol(s) = CCM MANAGER 0x0003
    Layer 1 Status:
SHUTDOWN
    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 = 1
    Total Allocated ISDN CCBs = 0

The card is a VWIC3-1MFT-T1/E1.

Here is a part of the 2921 conf, complete is on attachment :

card type e1 0 0

!

network-clock-participate wic 0

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

!

isdn switch-type primary-net5
isdn voice-call-failure 0

!

controller E1 0/0/0

framing NO-CRC4

pri-group timeslots 1-31 service mgcp

!

interface Serial0/0/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn incoming-voice voice

isdn bind-l3 ccm-manager

no cdp enable

!

voice-port 0/0/0:15

echo-cancel coverage 64

cptone FR

!

Please help, because "shutdown" state on layer 1 is'nt very referenced

1 ACCEPTED SOLUTION

Accepted Solutions
VIP Purple

ISDN Layer 1 shutdown on Channelized E1

Hi Bonnal,

Please check whether you are using correct pairs i.e 1,2 and 4,5 on VWIC side.

If yes, please try swapping them.

regds,

aman

5 REPLIES
Cisco Employee

ISDN Layer 1 shutdown on Channelized E1

I'd start by making sure you're using the right cable, and the cable works fine.

Who is emulating telco side???

HTH

java

if this helps, please rate

www.cisco.com/go/pdihelpdesk

HTH

java

if this helps, please rate

www.cisco.com/go/pdi
VIP Purple

ISDN Layer 1 shutdown on Channelized E1

Hi Bonnal,

Please check whether you are using correct pairs i.e 1,2 and 4,5 on VWIC side.

If yes, please try swapping them.

regds,

aman

New Member

ISDN Layer 1 shutdown on Channelized E1

Hello,

Jaime : Provider is Completel (in France)

So, pairs are differents if you plug your E1 on an Alcatel PABX, or VWIC Cisco card ?

Do you have a picture to build the connector ?

I have a 2nd provider in standby, it has an SDSL link which comes from MPLS to a OneAcces modem, I try to plug the PRI RJ45 copper straight cable in the VWIC, and it doesn't work too, whereas it works an Alcatel too!

VIP Purple

ISDN Layer 1 shutdown on Channelized E1

New Member

ISDN Layer 1 shutdown on Channelized E1

Hello,

Crossing pairs solves the problem.

Thank you.

Clement

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