00 · Header

Voice Options

T3-R05. PSTN choices and agent voice paths for Webex Contact Center: Contact Center PSTN, Cloud Connected PSTN, Local Gateway, Cisco Calling Plan, Webex Calling endpoints, and WebRTC. Article 2dputx. Retrieved 2026-10-14.

Prereq rooms: T3-R02 finishes the tenant. T2-R02 is the Local Gateway room. Do not paste Calling-only market counts over this article.

01 · TL;DR

PSTN is one choice. The agent path is another.

• Cloud PSTN options in the article: Webex Contact Center PSTN, Cloud Connected PSTN, and Cisco Calling Plan for trials and supported service-number regions. [cite:1]
• On-premises PSTN is Local Gateway, over the internet or Webex Edge Connect. [cite:1]
• Agent methods include PSTN, Webex Calling devices, WebRTC, premise PBX, and Microsoft Teams through Local Gateway. [cite:1]
• Login destinations are Dial Number, Extension, or Desktop. [cite:1]
• 2dputx header June 25, 2026. [cite:1]

02 · Map

PSTN choice and agent choice

Study diagram of the split 2dputx makes. Market counts below are quoted from that article. Header June 25, 2026. [cite:1]

03 · Core

Read the option you actually bought

Article 2dputx says a Webex Contact Center tenant must be connected to the PSTN, and agents need voice connectivity that matches their endpoints. The article recommends integrating telephony through the Webex cloud and Control Hub. If you already have a Webex Calling subscription, that subscription is used to connect voice services into Webex Contact Center as well. re-check [cite:1]

Common Edge is the shared edge. Calls are routed into Webex Contact Center using Webex Calling PSTN services, and the article says this allows routing without a Webex Calling subscription. All new Webex Contact Center subscriptions include Webex Calling PSTN services automatically. If the tenant was provisioned before October 2024, a partner may need to add Webex Calling PSTN service to use Common Edge. [cite:1]

Agent connection methods in the article: Webex PSTN DID or cellular; Webex Calling MPP devices or Webex App, which need a Webex Calling subscription; WebRTC desktops, which deliver media to the browser and do not require a local gateway, and which are unavailable for customers hosted in the Japan data center; premise PBX agents such as Unified CM or premise PSTN; Microsoft Teams clients through Local Gateway Direct SIP Routing. The tenant needs at least one of these delivery methods. [cite:1]

At login the agent chooses Dial Number, Extension, or Desktop. A dial number is typically +E.164 and that format is not mandatory, and the number must be reachable through Webex PSTN and routing. An extension is matched to a registered Webex Calling endpoint, and a match unlocks preferred-device selection. Desktop is WebRTC, and the article repeats that it is not available for the Japan data center. [cite:1]

When Webex Calling and Webex Contact Center are deployed together, the article says to fully configure Calling, including Control Hub, licensing, PSTN, and agent endpoints such as MPP phones and Webex App, before you configure the Contact Center tenant. [cite:1]

Article gsmsaeb says that after users are synchronized you add dial numbers under Tenant Settings > Voice. For Webex Calling, the location main number does not appear in the available-number list. A toll-free entry-point mapping needs the entitlement; without Cisco Bundle 2 inbound toll-free access, and when telephony type is Cisco PSTN, use a toll number. The same article says voice settings include short call threshold, sudden disconnect threshold, default ANI, call recording, and WebRTC. Numeric threshold values were not in the extract used here. TODO-verify those numbers. Header June 10, 2026. [cite:2]

04 · Ecosystem

Ecosystem and sister technologies

Voice options sit between Calling PSTN, the agent desktop, and emergency calling.

Common Edge

Shared edge. New subscriptions include Webex Calling PSTN services for it. [cite:1]

Webex Contact Center PSTN

Cisco-billed bundle for contiguous United States and Canada. No international dialing. [cite:1]

Cloud Connected PSTN

Certified providers. The article says over 65 countries. +E.164. re-check [cite:1]

Local Gateway

Customer SBC. The article says over 140 markets, OTT or Edge Connect. re-check [cite:1]

Cisco Calling Plan

Trials and regions where Cisco supports service and/or inbound toll-free numbers, in this article. [cite:1]

WebRTC desktop

Browser media. No local gateway required. Unavailable for the Japan data center. [cite:1]

Dial Number

Login destination. Typically +E.164, not mandatory, must be reachable. [cite:1]

Extension

Matched to a registered Webex Calling endpoint. Match enables preferred device. [cite:1]

Desktop

The login name for WebRTC. [cite:1]

Location main number

gsmsaeb: it does not appear in the Webex Calling available-number list for entry-point mapping. [cite:2]

mindmap
  Voice options
    PSTN
      CC PSTN
      CCP
      LGW
      Calling Plan
    Agents
      Webex Calling
      WebRTC
      Premise
      Teams
    Login
      Dial number
      Extension
      Desktop

Sister-technology matrix

Integration edges

Cross-platform bridges

Unified CM is a premise agent PBX in 2dputx, not the multi-tenant call controller. Dedicated Instance agent phones are a different article (nmhk7ve) and are not redesigned here. [cite:1]

Microsoft Teams agents are reached through Local Gateway Direct SIP Routing. That is not a statement that Teams Phone equals Webex Calling. [cite:1]

Amazon Connect and Genesys have no PSTN mapping on 2dputx.

Future-integration hooks

• Canon planning: T2-R02 keeps the Local Gateway port and IOS-XE detail. This room only places Local Gateway among the voice options.
• CCP “over 65 countries” and Local Gateway “over 140 markets” are quoted from 2dputx, header June 25, 2026. Do not replace them with the older at-a-glance PDF. [cite:1]
• Short-call and sudden-disconnect numeric thresholds are TODO-verify until gsmsaeb is read for the digits. [cite:2]
• Country lists for Cisco Calling Plan stay on the Calling Global Availability article the voice article names. They are not copied here. TODO-verify a specific country.

Ecosystem troubleshooting

05 · Flow

Choose PSTN, then the agent, then the login target

06 · Config

Paths the articles name

1. Finish the tenant with the Get Started article before this article’s steps. [cite:1]
2. If Calling and Contact Center deploy together, finish Calling, licensing, PSTN, and endpoints first. [cite:1]
3. Create a location and select the PSTN service that matches the geography you can defend from the article. [cite:1]
4. Give the tenant at least one agent delivery method. [cite:1]
5. Desktop profile controls which login destinations an agent sees. The article says administrators manage that behavior with desktop profiles. [cite:1]
6. Map numbers at Tenant Settings > Voice. Do not expect the Webex Calling location main number in the list. [cite:2]

07 · Limits

Numbers worth memorizing

08 · Trouble

Trouble

09 · Self-question

Oral ladder

10 · Lab

Draw two columns before you order numbers

• Goal: put the PSTN option and the agent method in different columns.
• Prereq: the tenant from T3-R02. Do not order production numbers.
• Write the geography next to Contact Center PSTN before you select it on a lab location.
• Mark WebRTC as unavailable if the data center is Japan.
• If the lab uses Calling phones, confirm the Calling subscription exists before the Contact Center mapping.
• Break it: map the location main number and refresh until it appears. Recovery: read the gsmsaeb sentence and change the main number only if you truly need that DID.
• Evidence: the two-column drawing.
• Reflection: which count you almost merged.

11 · Quiz

Quiz

12 · Audio

Studio fills these

13 · Interview

Oral-ready

1. 30 seconds. The tenant needs one PSTN connection and one way to reach agents. Those are different choices. [cite:1]

1. 2 minutes. PSTN is Contact Center PSTN, Cloud Connected PSTN, Local Gateway, or Cisco Calling Plan inside the article’s limits. Agents can be PSTN, Webex Calling, WebRTC, premise, or Teams through Local Gateway. [cite:1]

2. 30 seconds. Contact Center PSTN is contiguous US and Canada and does not dial internationally. [cite:1]

2. 2 minutes. CCP is the “over 65 countries” sentence. Local Gateway is the “over 140 markets” sentence. Both sentences are on 2dputx, header June 25, 2026. [cite:1]

3. 30 seconds. WebRTC does not need a local gateway and is unavailable in the Japan data center. [cite:1]

3. 2 minutes. Desktop at login is that WebRTC option. An extension match against a registered Calling endpoint unlocks preferred device. [cite:1]

4. 30 seconds. Configure Calling before the Contact Center tenant when both are in the design. [cite:1]

4. 2 minutes. New subscriptions include Webex Calling PSTN service for Common Edge. A pre-October 2024 tenant may need the partner to add it. [cite:1]

5. 30 seconds. The location main number is not in the Webex Calling entry-point list. [cite:2]

5. 2 minutes. Toll-free mapping without Bundle 2, on Cisco PSTN, means use a toll number. I do not invent the short-call threshold digits. [cite:2]

14 · Citations

Ledger

Retrieved 2026-10-14. Mirrors cites/T3-R05.md. Facts older than 12 months, and pages whose header date was not in the extract, stay marked re-check.

1. Set up voice channels for Webex Contact Center — help.webex — article 2dputx — help.webex.com article 2dputx — header June 25, 2026, retrieved 2026-10-14. PSTN options, agent methods, Common Edge, October 2024 partner add, WebRTC and Japan, login destinations, Calling-before-tenant. re-check
2. Set up voice settings for Webex Contact Center — help.webex — article gsmsaeb — help.webex.com article gsmsaeb — retrieved 2026-10-14 from the article extract. Tenant Settings, Voice. Location main number absent. Toll-free entitlement and Cisco Bundle 2. Voice settings named, numeric thresholds not copied. re-check
3. Emergency calling boundary — help.webex — articles nvfbjts and av6oo3 — WebRTC and Calling emergency paths are not steps in 2dputx. Taught in T2-R06.

15 · Re-engineer later

Open

• Open questions: header date on 2dputx and gsmsaeb. Short-call and sudden-disconnect digits.
• Facts still TODO-verify: those threshold digits, and any specific Calling Plan country.
• Facts still re-check: 2dputx and gsmsaeb in full, plus the 65 and 140 counts.
• Assets missing: a two-column diagram export, audio, redacted location screenshot.
• Next review date: next read of 2dputx.