> ## Documentation Index > Fetch the complete documentation index at: https://developers.telnyx.com/llms.txt > Use this file to discover all available pages before exploring further. # Update voice channels for non-US Zones > Update the number of Voice Channels for the Non-US Zones. This allows your account to handle multiple simultaneous inbound calls to Non-US numbers. Use this endpoint to increase or decrease your capacity based on expected call volume. ## OpenAPI ````yaml https://telnyx-openapi-ng.s3.us-east-1.amazonaws.com/numbers-identity/voice-channels.yml put /channel_zones/{channel_zone_id} openapi: 3.1.0 info: title: Telnyx Voice Channels API version: 2.0.0 description: API for Voice Channels. contact: email: support@telnyx.com servers: - url: https://api.telnyx.com/v2 security: - bearerAuth: [] paths: /channel_zones/{channel_zone_id}: parameters: - $ref: '#/components/parameters/GcbChannelZoneId' put: tags: - Voice Channels summary: Update voice channels for non-US Zones description: >- Update the number of Voice Channels for the Non-US Zones. This allows your account to handle multiple simultaneous inbound calls to Non-US numbers. Use this endpoint to increase or decrease your capacity based on expected call volume. operationId: PatchChannelZone requestBody: description: Quantity of reserved channels and organizational update option content: application/json: schema: type: object properties: channels: type: integer format: int64 description: The number of reserved channels required: - channels required: true responses: '200': $ref: '#/components/responses/PatchGcbChannelZoneRequestResponse' '400': description: Bad request '401': description: Unauthorized '404': description: Resource not found default: $ref: '#/components/responses/voice-channels_GenericErrorResponse' x-codeSamples: - lang: JavaScript source: >- import Telnyx from 'telnyx'; const client = new Telnyx({ apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted }); const channelZone = await client.channelZones.update('channel_zone_id', { channels: 0 }); console.log(channelZone.id); - lang: Python source: |- import os from telnyx import Telnyx client = Telnyx( api_key=os.environ.get("TELNYX_API_KEY"), # This is the default and can be omitted ) channel_zone = client.channel_zones.update( channel_zone_id="channel_zone_id", channels=0, ) print(channel_zone.id) - lang: Go source: "package main\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\n\t\"github.com/team-telnyx/telnyx-go\"\n\t\"github.com/team-telnyx/telnyx-go/option\"\n)\n\nfunc main() {\n\tclient := telnyx.NewClient(\n\t\toption.WithAPIKey(\"My API Key\"),\n\t)\n\tchannelZone, err := client.ChannelZones.Update(\n\t\tcontext.TODO(),\n\t\t\"channel_zone_id\",\n\t\ttelnyx.ChannelZoneUpdateParams{\n\t\t\tChannels: 0,\n\t\t},\n\t)\n\tif err != nil {\n\t\tpanic(err.Error())\n\t}\n\tfmt.Printf(\"%+v\\n\", channelZone.ID)\n}\n" - lang: Java source: |- package com.telnyx.sdk.example; import com.telnyx.sdk.client.TelnyxClient; import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient; import com.telnyx.sdk.models.channelzones.ChannelZoneUpdateParams; import com.telnyx.sdk.models.channelzones.ChannelZoneUpdateResponse; public final class Main { private Main() {} public static void main(String[] args) { TelnyxClient client = TelnyxOkHttpClient.fromEnv(); ChannelZoneUpdateParams params = ChannelZoneUpdateParams.builder() .channelZoneId("channel_zone_id") .channels(0L) .build(); ChannelZoneUpdateResponse channelZone = client.channelZones().update(params); } } - lang: Ruby source: >- require "telnyx" telnyx = Telnyx::Client.new(api_key: "My API Key") channel_zone = telnyx.channel_zones.update("channel_zone_id", channels: 0) puts(channel_zone) - lang: PHP source: >- channelZones->update('channel_zone_id', channels: 0); var_dump($channelZone); } catch (APIException $e) { echo $e->getMessage(); } - lang: CLI source: |- telnyx channel-zones update \ --api-key 'My API Key' \ --channel-zone-id channel_zone_id \ --channels 0 components: parameters: GcbChannelZoneId: name: channel_zone_id in: path description: Channel zone identifier required: true schema: type: string responses: PatchGcbChannelZoneRequestResponse: description: Successfuly patched channel zone content: application/json: schema: $ref: '#/components/schemas/GcbChannelZone' voice-channels_GenericErrorResponse: description: Unexpected error content: application/json: schema: $ref: '#/components/schemas/voice-channels_Errors' schemas: GcbChannelZone: title: Channel zone object required: - record_type - countries - id - name - channels type: object properties: record_type: type: string enum: - channel_zone example: channel_zone countries: type: array items: type: string description: >- List of countries (in ISO 3166-2, capitalized) members of the billing channel zone example: - BE - EL - LT - PT - BG - ES - LU - RO - CZ - FR - HU - SI - DK - HR - MT - SK - DE - IT - NL - FI - EE - CY - AT - SE - IE - LV - PL id: type: string example: 1653e6a1-4bfd-4857-97c6-6a51e1c34477 name: type: string example: Euro channel zone channels: type: integer format: int64 example: 7 created_at: type: string description: ISO 8601 formatted date of when the channel zone was created example: '2019-01-23T18:10:02.574Z' updated_at: type: string description: ISO 8601 formatted date of when the channel zone was updated example: '2019-01-23T18:10:02.574Z' voice-channels_Errors: properties: errors: type: array items: $ref: '#/components/schemas/voice-channels_Error' type: object voice-channels_Error: required: - code - title properties: code: type: string title: type: string detail: type: string source: type: object properties: pointer: description: JSON pointer (RFC6901) to the offending entity. type: string parameter: description: Indicates which query parameter caused the error. type: string meta: type: object additionalProperties: true type: object securitySchemes: bearerAuth: scheme: bearer type: http ````