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E1/PRi configuration with Nokia Mux

mferhai
Level 1
Level 1

hi,

i would like to configure the e1/PRI (cisco2600 with NM-HDV card 30 channels)to integrate 12 PSTN lines using the NOKIA MUX.

I configured the E1 1/0 controller as follow :

- framing no-crc4

- pri-group timeslots 1-12

i configured the interface serial 1/0:15 as follow:

- isdn switch-type primary-qsig

- isdn overlap-receiving

- isdn incoming-voice voice

- isdn bchan-number-order ascending

after setting the show isdn status i ve got :

layer 1 active

layer 2 state TEI-ASSIGNED;

Could you please help me to do the configuration and solve this problem

Thanks.

1 Reply 1

layer3
Level 1
Level 1

Hi.

I am unfamiliar with the nokia mux, but once you take care of the more obvious (correct time-slots, framing, switch-type) TEI-Assigned usually means that the protocol emulation is wrong.

The easy way to confirm this is to add

isdn protocol-emulate network

to s1/0:15. Don't forget to clear the interface aftwerwards

also check

debug isdn q921

The normal behaviour is to get one TX and one RX.

I have experienced several behaviours when one gets hung on TEI ASSIGNED.

If you get tons of BAD FRAME on the RX packets, you have the protocol emulation wrong.

If you only get TX packets, try to place a call and see if some RX packets show up. If they do and thay are BAD FRAME, change protocol emulation. On the other hand, if they do show up without BAD FRAME that's more weird..

Cheers,

F