LDAP lookup doesn't work, though directory is basically searchable (T56A / T58)

[Mr_Christian]

Hi Samuel,

I just seem to have figured it out myself a few minutes ago. Having tried various configurations I ended up with the following:

ldap.name_filter = (|(searchContact=%)(searchNumber=%))
ldap.number_filter = (|(searchContact=%)(searchNumber=%))

Though I already tried this configuration before, it is working now. I guess the reason it didn't work before was that the telephone system, the phone and the LDAP had different representations of the number. Let's try to explain what presumably was happening:

Within the 3CX telephone system I replaced +49 with 0 respectively + with 00. This lead to the phenomenom that the phone got the number without leading country code. (The reason for this number transformation was that I wanted to be able to dial calls from the missed calls list from within the 3CX softphone and this didn't send the + sign to the phone ending up in a wrong number. I later figured out that there was an option to automatically change the + sign with 00.)

Within the LDAP the number also has a leading + sign. Though the search functionality of our phone finds the number ignoring different number formats, it always replies with a number having the leading +. This seemed to confuse the phone.

The last part of the riddle was to find out that the phone treats all numbers with a leading + sign as a string and therefor queries the LDAP using the name- instead of the number-filter. Thus always searching both fields did the trick.

If someone else runs into the same problem: Always double check that the number sent from the telephone system and the one that comes from the ldap are in the same format. And keep in mind that the phone treats numbers with a + sign as names. That's it.

Thanks a lot for the offered help. I might come back to you if there is something still not working.

Best regards

Chris

PS: It would be great to know how the phone works internally. Am I right that the number sent back from the LDAP is double checked within the phone? And does the phone really handle numbers with the + sign as strings and thus uses the name filter instead of the number filter? Thanks a lot for clarification - I gues this would help others struggling with the LDAP feature a lot!