As jy my later skakel, sal ek jou stem hoor.

Here as introduces a condition, so it means if. It is not the English as meaning while or because.

Because as starts a subordinate clause. In Afrikaans, subordinate clauses usually send the finite verb to the end.

So the pattern is:

• As
  • subject + other words + verb
• As jy my later skakel

That word order is very common after words like as, dat, and omdat.

Because the sentence after the comma is the main clause, and Afrikaans main clauses follow the verb-second rule.

The whole first clause As jy my later skakel counts as the first element, so the finite verb of the main clause must come next:

• first element: As jy my later skakel
• second position: sal
• then the subject: ek

That is why it is sal ek, not ek sal, in this version of the sentence.

Because sal is the future auxiliary, and the main verb stays in its basic form at the end of the clause.

So:

• sal = will
• hoor = hear

Together: sal ... hoor

This is a normal Afrikaans pattern with auxiliaries and modal verbs.

Afrikaans often uses the present tense in an if clause when the future meaning is already clear.

So As jy my later skakel is natural, just like English says If you call me later, not usually If you will call me later.

The future idea is already carried by sal in the main clause.

Here skakel means call, phone, or contact.

The verb has other meanings in other contexts, such as switch or connect, but with a person as the object it commonly means call/contact.

In everyday Afrikaans, bel is also very common for phone.

Jou can mean both you and your. The context shows which one it is.

• before a noun: jou stem = your voice
• as an object by itself: Ek sien jou = I see you

So in jou stem, it is clearly possessive: your.

Yes. My can mean both me and my.

In this sentence:

• skakel my = call me

But before a noun, it would mean my:

• my stem = my voice

Afrikaans often uses the same form for the object pronoun and the possessive.

Because in a subordinate clause, adverbs like later often come before the final verb.

So jy my later skakel is a normal Afrikaans order.

You will often see time words placed before the verb at the end of a subordinate clause.

No. After sal, Afrikaans uses the bare infinitive, without te.

So:

• sal hoor = correct
• sal te hoor = incorrect

The same happens with other verbs like kan, moet, and wil.

Yes. That is also correct and natural.

The meaning stays the same. The main difference is which clause comes first:

• As jy my later skakel, sal ek jou stem hoor.
• Ek sal jou stem hoor as jy my later skakel.

Both are good Afrikaans.

Because hoor means hear, while luister means listen.

• hoor = perceive a sound
• luister = actively listen

So if the idea is that you will be able to hear the person's voice, hoor is the right verb.