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[Essam ABDOU]

I guess in many cases we can even say the word /-tl/, not just /-tel/.

[H0riz0n]

المشاركة الأصلية كتبت بواسطة Essam ABDOU

I guess in many cases we can even say the word /-tl/, not just /-tel/.

That's right Mr Essam.
"tel" here is letters not phonetic symbols. In order to pronounce /-tl/ correctly you have to add an intrusive vowel between /-t/ and /-l/ so the letter L has to be pronounced as a complete syllable (syllabic L) - the easiest way to get your students pronounce the /l/ is to ask them: What letter is this : L?
The Answer will be "el".
This is syllabic L
Best Regards