Got a weird one - PRI calls drop when you buzz people in via Algo Doorphone Control

[norstar23]

Got a weird one. I have a customer with a 23 channel PRI in a MICS. They also have 2 newer Algo 3026 analog trunk door phones with latch control connected to a DS card - lines 31 and 32. Whenever the receptionist buzzes a customer in the door by pressing the number 6, all current calls on the PRI will drop off. Other than that, the PRI works perfectly well.

Does anyone have any ideas why this is happening? My next steps will be the following:
1. Try to change the buzzer digit from 6 to something else
2. Perhaps try putting the analog trunk lines through a M12X0 and see if that makes a difference.
3. Find an older version of the Algo door phone and see if the Algo 3026 is the culprit.


Any ideas or help would be appreciated.

Thank you!

 

[curlycord]

Find out what is using the digit 6 in the KSU.





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curlycord

http://www.curlycord.com

 

[norstar23]

Nothing right now. I changed all the DNs in the system that started with a 6XX to start with a 5XX

 

[curlycord]

Weird indeed

Take the DOC away from the equation, make the usual door call then dial 6 to see if calls drop.
This will determine if DOC is an issue for some unknown reason.

Swap the trunk card too.






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curlycord

http://www.curlycord.com

 

[norstar23]

Got it sorted out. Algo changed their doorphone latch control terminals. Unbeknown to me, the 3226 now includes its own 24v latch driver power supply. I had my own power supply and followed the instructions in the manual (which were apparently a little unclear). Because of my wiring configuration, I was sending power through the T1 card every time someone was being buzzed in!