Show ISDN status shows : Layer 1 Status: DEACTIVATED

[TrickTrick]

Hello, 

I'm trying to setup a digital line connected to one BRI interface, but the link between my voice gateway and telco equipment doesn't seem to be ACTIVE by issuing the commend "show isdn status"
The configuration in the BRI interface :
interface BRI0/2/0:0
no ip address
isdn switch-type basic-net3
isdn point-to-point-setup
isdn incoming-voice voice

trunkgroup Groupe1

tried different things without success based on this https://www.cisco.com/c/en/us/support/docs/dial-access/integrated-services-digital-networks-isdn-channel-associated-signaling-cas/5706-bri-layer1.html#deactivated  : Shut  / no shut ;  no backup command is added

Didn't try to make a call yet thinking the status should be activated, the only thing i didn't try yet is isdn tei-negotiation first-call

what's the solution guys in such situation  ?

Thank you

[TrickTrick]

Already added this to the bri interface before... it always switch back to TEI ASSIGNED

[TrickTrick]

if I enable layer 2 debug (debug isdn q921) an exchange should occur right ? without doing anything, it seems like nothing happens when I enable it

[Mike_Brezicky]

Yes, the expected output even with failures should show Q921 SAMBE messages being sent over and over

From Ciscls BRI Troubleshooting doc - https://www.cisco.com/c/en/us/support/docs/dial-access/integrated-services-digital-networks-isdn-channel-associated-signaling-cas/5707-bri-layer2.html

*Mar 1 00:03:46.976: ISDN BR0: TX -> IDREQ ri = 29609 ai = 127  
! -- IDREQ: Identity Request transmitted (Tx)to the ISDN switch requesting a ! -- Terminal Endpoint Identifier (TEI) ! -- Action Indicator, AI = 127 indicates that the ISDN switch can assign any ! -- TEI value available 

*Mar 1 00:03:47.000: ISDN BR0: RX <- IDASSN RI = 29609 AI = 96
! -- IDASSN: Identity Assigned message Received(Rx) with the TEI value(96) ! -- assigned by the ISDN switch

*Mar 1 00:03:47.016: ISDN BR0: TX -> SABMEp sapi = 0 tei = 96
! -- Request the connection be put in Multiple Frame Established State

*Mar 1 00:03:47.036: ISDN BR0: RX <- UAf sapi = 0 tei = 96
! -- Unnumbered Acknowledgment(UA) of the SABME message ! -- Layer 2 is now Multiple Frame Established

*Mar 1 00:03:47.040: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI 96
   changed to up
*Mar 1 00:04:07.340: ISDN BR0: RX <- INFOc sapi = 0 tei = 96 ns = 0 nr = 0
   i = 0x08007B3201C3
*Mar 1 00:04:07.352: ISDN BR0: TX -> RRr sapi = 0 tei = 96 NR = 1
! -- RRr Service Access Point Identifier (sapi=0) indicates data link services ! -- are provided to a network Layer.