telefonisch
by phone
Something happens over the phone or with the help of a telephone. This word describes the manner of a communication or action.
Wir können die Details später telefonisch besprechen.
We can discuss the details by phone later.

by phone
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by phone
Something happens over the phone or with the help of a telephone. This word describes the manner of a communication or action.
Wir können die Details später telefonisch besprechen.
We can discuss the details by phone later.

The word 'telefonisch' (by phone/telephone) is derived from the noun 'das Telefon' (the telephone). The ending '-isch' is a typical way to form an adjective from a noun that describes an affiliation or characteristic.
Eine telefonische Bestellung ist bei uns leider nicht möglich.
Unfortunately, ordering by phone is not possible with us.
'Telefonisch' (by phone) is almost always used as an adverb. It describes the manner in which an action is carried out and then usually stands directly near the verb.
Ich bin morgen ab 10 Uhr telefonisch für Sie erreichbar.
I will be reachable by phone tomorrow from 10 a.m.
Common verbs that are combined with 'telefonisch' (by phone) are: 'besprechen' (to discuss), 'klären' (to clarify), 'bestellen' (to order), 'anfragen' (to inquire), or 'sich melden' (to get in touch).
Der Kundenservice hat sich telefonisch bei mir gemeldet.
Customer service got in touch with me by phone.
personal / in person
'persönlich' and 'telefonisch' both describe how contact or an action takes place. Here they often stand in contrast: 'persönlich' means that someone is there in person and speaks directly with the other person. 'telefonisch' means that something happens by phone. Learners may confuse the words because both can involve direct contact. The practical difference is: 'persönlich' means person to person in the same place; 'telefonisch' means by phone.

Heute vereinbart Frau Meier den Termin telefonisch.
Today Ms. Meier is arranging the appointment by phone.
Milan bringt die Unterlagen morgen persönlich ins Büro.
Milan is bringing the documents to the office in person tomorrow.