Update using-expressroute-for-microsoft-pstn.md

[slocoach]

Removed eol offerings, small edits for clarity.

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Can you review the proposed changes?

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@tracsman Could you review this proposed update to your article and enter #sign-off in a comment if it's ready to merge?

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@tracsman

Can you review this old PR and determine whether it needs to be closed or merged?

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[Copilot]

Pull Request Overview

This PR updates documentation for using ExpressRoute with Microsoft PSTN services, removing end-of-life offerings and making editorial improvements for clarity. The changes streamline the content to focus on currently supported services.

• Removed references to deprecated Azure Communications Gateway and Azure Communication Services Direct Routing
• Updated encryption support messaging and service provider recommendations
• Added specific community reference information for configuration

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

The description should use 'services' (plural) instead of 'service' (singular) to maintain grammatical consistency, even though only one service is now listed.

Suggested change

	description: ExpressRoute circuits can be used for Microsoft PSTN service, Operator Connect.
	description: ExpressRoute circuits can be used for Microsoft PSTN services, Operator Connect.

[Copilot]

The word 'offer' should be 'access' or 'connect to' since customers use ExpressRoute to connect to services, not offer them.

Suggested change

	You can use ExpressRoute Microsoft Peering to offer the following Microsoft PSTN services:
	You can use ExpressRoute Microsoft Peering to access the following Microsoft PSTN services:

[Copilot]

Should be 'ExpressRoute' (one word) instead of 'Express Route' (two words) to match the correct product name used throughout the document.

Suggested change

	> Encryption support is pending delivery for Express Route PSTN connectivity.
	> Encryption support is pending delivery for ExpressRoute PSTN connectivity.