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Can't get T1 DCH to establish

Can't get T1 DCH to establish

Can't get T1 DCH to establish

(OP)
As the title says, I'm having issues with getting my DCH to establish. I get a myriad of errors such as the following:

DCH055 DCH: 51 RLS RED ALRM TIME: 21:55:08 5/07/2024

TIM000 22:00 5/7/2024 CPU 0

XMI001 4 0 6 TMDI

TMDI102 TMDI 4 0 6

DCH: 51 DISABLED (TMDI 4 0 6 SYS DSBL)
TMDI112 TMDI 4 0 6

TMDI300 4 0 6 FROM: ENBL TO: SYS DSBL - NOT RESPONDING
TIME: 22:04:15

TMDI300 4 0 6 FROM: SYS DSBL - NOT RESPONDING TO: SYS DSBL - SELF TESTING
TIME: 22:04:15

TMDI207 TMDI 4 0 6 PRIE 00000006 00000008

DCH2010 51 3

DCH055 DCH: 51 RLS RED ALRM TIME: 22:06:19 5/07/2024

DCH055 DCH: 51 RLS RED ALRM TIME: 22:06:39 5/07/2024

Other end is a Cisco 2921 which should properly be configured.

controller T1 0/1/1
cablelength short 110
pri-group timeslots 1-24
!
!
!

interface Serial0/1/1:23
no ip address
encapsulation hdlc
no cdp enable
isdn switch-type primary-qsig
isdn incoming-voice voice
isdn send-alerting
isdn bchan-number-order ascending
!

Any insights? Much appreciated.

RE: Can't get T1 DCH to establish

Was it previously working?

If not, then it could be a number of reasons.

Check that you are using the correct protocol.

Try the following commands which might be listed here in the wrong order as I'm doing this on my phone from memory.

To disable the card and DCH

LD 96
DIS DDSL 51
DIS MSDL 51

LD 60
DIS (DDSL card slot)
STAT (DDSL card slot to check its disabled)

ENL (DDSL card slot)
STAT (card again to see if trunks are idle)

LD 96
ENL DDSL 51
ENL MSDL 51
STAT MSDL 51
STAT DDSL

LD 60
SSCK 0 to check clocking.

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

Website = http://somertel.net
linkedin

RE: Can't get T1 DCH to establish

(OP)
Yeah i got it to work, but am having the same troubles adding another TMDI card.

Same issues, CC RED RED ALARM on the second card.

Now i'm having issues getting the second card to recognize the other main clock?

RE: Can't get T1 DCH to establish

Only one Digital trunk card needs to be clocking as the main source on the phone system. You can have a secondary source from a different card.

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

Website = http://somertel.net
linkedin

RE: Can't get T1 DCH to establish

(OP)
Correct. That's what I'm trying to setup here is primary and secondary clocks. It seems like on the second card, the DCH will not establish and channels 1-23 are in a MBSY state.

RE: Can't get T1 DCH to establish

What type of trunk card are you using?.

Having a red clocking LED against the 2nd card won't affect its connectivity.

What protocol has been set and is it using a MSDL?

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

Website = http://somertel.net
linkedin

RE: Can't get T1 DCH to establish

(OP)
This is a TMDI 1.5 DTI/PRI card.

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