Service Description: Validation and Test Optimization Services

Transcription

1 Page 1 f 8 Service Descriptin: Validatin and Test Optimizatin Services This dcument describes the Validatin and Test Optimizatin Services. Related Dcuments: This dcument shuld be read in cnjunctin with the fllwing dcuments als psted at (1) Glssary f Terms; (2) List f Services Nt Cvered; and (3) Severity and Escalatin Guidelines. All capitalized terms in this descriptin have the meaning ascribed t them in the Glssary f Terms. Direct Sale frm Cisc. If yu have purchased these Services directly frm Cisc, this dcument is incrprated int yur Master Services Agreement (MSA), Advanced Services Agreement (ASA), r equivalent services agreement executed between yu and Cisc. All capitalized terms nt defined in the Supplemental Glssary f Terms fr Validatin and Test Optimizatin Services at the end f this dcument have the meaning ascribed in the MSA r equivalent services agreement executed between yu and Cisc. If nt already cvered in yur MSA r equivalent services agreement, this dcument shuld be read in cnjunctin with the Related Dcuments identified abve. In the event f a cnflict between this Service Descriptin and yur MSA r equivalent services agreement, this Service Descriptin shall gvern. Sale via Cisc Authrized Reseller. If yu have purchased these Services thrugh a Cisc Authrized Reseller, this dcument is fr descriptin purpses nly; is nt a cntract between yu and Cisc. The cntract, if any, gverning the prvisin f this Service will be the ne between yu and yur Cisc Authrized Reseller. Yur Cisc Authrized Reseller shuld prvide this dcument t yu, r yu can btain a cpy f this and ther Cisc service descriptins at This Validatin and Test Optimizatin Service is intended t supplement a current supprt agreement fr Cisc prducts and is nly available where all Prduct(s) in Custmer s Netwrk is supprted thrugh a minimum f cre services such as Cisc s Smartnet Ttal Care and Sftware Applicatin Services, as applicable. Cisc shall prvide the Validatin and Test Optimizatin Service described belw as selected and detailed n the Purchase Order fr which Cisc has been paid the apprpriate fee. Cisc shall prvide a Qute fr Services ( Qute ), identifying the varius service elements with the crrespnding SKU as shwn in Appendix A, setting ut the extent f the Services and duratin that Cisc shall prvide such Services. Cisc shall receive a Purchase Order that references the Qute agreed between the parties and that, additinally, acknwledges and agrees t the terms cntained therein. Validatin and Test Optimizatin Services Services Summary Validatin and Test Service prvides specific help fr yur netwrk supprt staff in the frm f Test Assessment and Plan, Setup and Test Executin, Test Results Reprt and Final Cnsultatin delivery. Validatin and Test Optimizatin Service includes service areas f Brderless NOS, Data Center, Cllabratin, Mbile Internet, Enterprise Security, Enterprise Wireless LAN, NGN, SP Vide, Mbility, and SP Security Architectures. Validatin and Test Optimizatin Services prvide annual, nging supprt fr Custmer envirnment addressing the fllwing: Validatin and Test Services fr NGN Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review - Dedicated Validatin and Test fr Brderless NOS Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review Dedicated Validatin and Test Services fr Data Center Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review Dedicated Validatin and Test Services fr Cllabratin Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review Dedicated

2 Page 2 f 8 Validatin and Test Services fr Mbile Internet Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review Dedicated Validatin and Test Services fr Enterprise Security Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review Dedicated Validatin and Test Services fr SP Vide Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review Dedicated Validatin and Test Services fr Mbility Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review Dedicated Validatin and Test Services fr Enterprise Wireless LAN Validatin-Test Cycle and Review Standard Validatin-Test Cycle and Review Dedicated Validatin and Test Services fr SP Security Validatin-Test Cycle and Review - Standard Validatin-Test Cycle and Review Dedicated Cisc Respnsibilities Cisc shall prvide Services fr the Custmer during Standard Business Hurs (unless stated therwise). Cisc shall prvide the fllwing General Supprt prvisins fr all Services selected by Custmer: General Supprt Designate an engineer ( Validatin and Test Netwrk Cnsulting Engineer ) t act as the primary interface with the Cisc prject manager appinted fr the Custmer. Participate in regular visits t the Custmer either via phne, r in-persn t review practive deliverables and activities and t plan fr next quarter. In-persn visits nt t exceed eight (8) days in aggregate. Additinal visits will be mutually agreed at Cisc s then-current travel and labr rates. Designate engineer(s) t wrk with the Cisc prject management and the primary Validatin and Test Netwrk Cnsulting Engineer. Participate in peridic cnference calls (usually weekly) t review Custmer s prject status, planning and the Services being prvided. Mnitr a Custmer-specific Cisc alias t facilitate cmmunicatin with primary Advanced Services Engineer as well as the engineers n the Cisc Services prject delivery team. Make cllabratin tls available, as determined by Cisc, fr the purpses f (including but nt limited t): hsting meetings, managing dcumentatin, instant messaging, desktp sharing, and cllabrative spaces. The quantity f any reprting and effrts fr nging activities described herein will vary depending n Custmer requirements and what Custmer and Cisc mutually agree upn when Services are purchased as identified in the Qute prvided by Cisc. Fllwing activities are cmmn t all technlgies and architectures: Prvide Custmer-site lab slutin validatin and test executin and supprt. Setup f Custmer lab with test and autmatin tls and methds f testing fr slutin infrastructure, cnfiguratin, integratin and aggregatin pints fr the Validatin and Test deplyment including prtcls, security and management cnsideratins. Cnsulting and advising n test autmatin needs. Cnducting tests based n the applicable Test Plan.

3 Page 3 f 8 Prvide Custmer site supprt fr issues fund during Custmer testing phase. helps custmer develp autmatin needs fr slutin validatin and test. Cisc will cnsult with Custmer via a series f meetings t develp an understanding f Custmer s slutin testing autmatin needs and autmatin platfrm. Assess the availability f preferred Autmatin Platfrms within Custmer s premise in case slutin validatin and test executin is t be perfrmed within Custmer s lab. Prvide a slutin validatin and test autmatin plan t custmer fr review and apprval. Develp test autmatin scripts based n the autmatin scpe identified by Custmer in test autmatin plan. Prvide access t the autmatin library s custmer has executin privileges fr autmatin scripts. helps develp verall strategy fr slutin validatin and testing in lab. Cisc will cnsult with Custmer via a series f meetings t develp an understanding f Custmer s slutin testing capabilities, lab strategy, practices, and business gals. Review f Custmer s test envirnment, resurces, cncerns, and challenges. Analysis f Custmer s current slutin testing and test autmatin practices and lab strategy. A Testing Strategy Reprt will cntain verall strategy recmmendatins and the analysis cmparing Custmer s current practices t Cisc s recmmended best practices fr custmer s lab envirnment. service helps custmer have persistent lab in Cisc s envirnment t prvide Slutin Validatin and Test cnsulting services in Cisc lab that supprt and align with Custmer s technlgy radmaps. Develp test plan strategy t align with technlgy radmap. Execute Test cycles which may include: Review Custmer slutin design, if applicable; Review Custmer test plans, if applicable; Review and update Custmer test autmatin plans, if applicable. Update Custmer test plans, as applicable; Set up lab and test tls; Execute Custmer test plans; Recmmend mdificatins t the Custmer design during test executin, if applicable; Dcument and review test results frm Test Plan executin with Custmer. Designate a single pint f cntact ("Cisc Prject Manager" r PM ) fr all issues relating t the Services. Such persn shall be identified in Primary Cntacts and shall be available during nrmal business hurs. Designate a backup when the Cisc Prject Manager is nt available. Prvide Custmer with a list f designated Cisc persnnel rles and respnsibilities under this service. Wrk with Custmer t create a Prject Plan. Prject Plan is a dcument that prvides further details n the Services and acts as the baseline dcument, against which the Prject Manager can manage deliverables, assess prgress, address change management issues and nging viability questins fr the Services. Wrk with Custmer t identify and dcument dependencies, risks and issues assciated with the successful cmpletin f the service. Prvide a prject schedule apprved by Custmer, highlighting all deliverables and services utlining the planned events f the prject, shwing resurce, and timescales. Crdinating and managing all Cisc respnsibilities under this service. Participating in regularly scheduled prject review meetings r cnference calls, if required. Prvide Custmer the details f persnnel requiring access t Custmer, at least ten (10) business days prir t the scheduled dated Cisc requires access t Custmer premises. Delivering a prject status reprt t the Custmer every tw weeks. Review all pertinent Custmer site infrmatin received frm Custmer. Ensure Cisc emplyees and any subcntractrs cnfrm t custmer s reasnable wrkplace plicies, cnditins, and safety regulatins that are cnsistent with Cisc s bligatins stated here and that are prvided t Cisc in writing prir t cmmencement f the services. This is prvided that Cisc s persnnel r subcntractrs shall nt be required t sign individual agreements with custmer r waive any persnal rights. Supply Cisc prject team persnnel with a displayable frm f identificatin t be wrn at all times during prject activities at Custmer site(s). Prvide the apprpriate number f qualified persnnel t prvide the services as required by this service. helps custmer stage the slutin in Cisc lab t plan and execute slutin validatin test cycle. Cisc will cnsult with Custmer via a series f meetings t develp an understanding f Custmer s slutin testing gals, implementatin bjectives and requirements, and generate a prpsed Test Plan, testing acceptance criteria, and Staging timeline.

4 Page 4 f 8 Once agreed, Cisc will receive Custmer s equipment, cnfigure, and execute the tests dcumented in the Test Plan and reprt findings t Custmer. After ntificatin f cmpletin f testing, Custmer wuld be ntified by Cisc t arrange fr the shipment back t the Custmer. Validatin-Test Cycle and Review - Standard Validatin-Test Cycle and Review - Standard helps custmer plan and execute test cycle that is estimated t last between 8 t 12 weeks. Cisc will cnsult with Custmer via a series f meetings t develp an understanding f Custmer s slutin-riented testing gals, autmatin needs and requirements, and generate a prpsed Test Plan. Analysis f requirements such as sftware strategy, platfrms, tplgy, prtcls, and cnfiguratins. Test Plan develpment r review/refine existing test plan; Once agreed, Cisc will execute the tests dcumented in the Test Plan and reprt findings t Custmer. Validatin and Testing Supprt may include, amng ther infrmatin, the fllwing: Schedule facilities, equipment and resurces; Test Set Up Perfrm the Physical Lab Setup; Test Autmatin Develp and/r extend the autmated test cases (r) scripts; Test Executin Execute the Test Plan; and, Test Results Analysis Dcument the results in a Test Reprt. Validatin and Testing Supprt is nly available t certain gegraphic lcatins and will be specified in the Qute fr Services. Validatin-Test Cycle and Review - Dedicated Validatin-Test Cycle and Review - Dedicated helps custmer plan and execute test cycle that is estimated t last between 30 t 45 weeks. Cisc will cnsult with Custmer via a series f meetings t develp an understanding f Custmer s slutin-riented testing gals, autmatin needs and requirements, and generate a prpsed Test Plan. Analysis f requirements such as sftware strategy, platfrms, tplgy, prtcls, and cnfiguratins. Test Plan develpment r review/refine existing test plan. Once agreed, Cisc will execute the tests dcumented in the Test Plan and reprt findings t Custmer. Validatin and Testing Supprt may include, amng ther infrmatin, the fllwing: Schedule facilities, equipment and resurces; Test Set Up Perfrm the Physical Lab Setup; Test Autmatin Develp and/r extend the autmated test cases (r) scripts; Test Executin Execute the Test Plan; and, Test Results Analysis Dcument the results in a Test Reprt. Validatin and Testing Supprt is nly available t certain gegraphic lcatins and will be specified in the Qute fr Services. Custmer Respnsibilities General Supprt Designate at least tw (2) but nt mre than six (6) technical representatives in each area cvered under Validatin and Test, wh must be Custmer's emplyees in a centralized Netwrk supprt center (Custmer's technical assistance center), t act as the primary technical interface t the Validatin and Test Engineer(s). Custmer will designate as cntacts senir engineers with the authrity t make any necessary changes t the Netwrk cnfiguratin. One individual, wh is a senir member f management r technical staff, will be designated as Custmer s primary pint f cntact t manage the implementatin f services selected under this Service Descriptin (e.g., chair the weekly cnference calls, assist with priritizatin f prjects and activities). Custmer's technical assistance center shall maintain centralized netwrk management fr its Netwrk supprted under this Service Descriptin, capable f prviding Level 1 and Level 2 supprt. Prvide reasnable electrnic access t Custmer's Netwrk t allw the Validatin and Test Engineer t prvide supprt. If Cisc prvides Data Cllectin Tls r scripts lcated at Custmer's site, Custmer shall ensure that such Data Cllectin Tls r scripts are lcated in a secure area, within a Netwrk envirnment prtected within a firewall and n a secure LAN, under lck and key and with access restricted t thse Custmer emplyee(s) r cntractr(s) wh have a need t access the Data Cllectin Tls and/r a need t knw the cntents f the utput f Data Cllectin Tls. In the event Data Cllectin Tl prvided by Cisc is Sftware, Custmer agrees t make apprpriate cmputers available and dwnlad Sftware as needed. Custmer shall remain respnsible fr any damage t r Validatin and Test r theft f the Data Cllectin Tls while in Custmer s custdy. Prvide a Netwrk tplgy map, cnfiguratin infrmatin, and infrmatin f new features being implemented as needed. Ntify Validatin and Test Engineer f any Dedicated Netwrk changes (e.g., tplgy, cnfiguratin, new IOS releases). In the event the Netwrk cmpsitin is altered, after the Services selected under this Service Descriptin have becme effective, Custmer is respnsible t ntify Cisc in writing within ten days (10) f the change. Cisc may require mdificatins t the fee if the Netwrk cmpsitin has increased beynd the riginal pricing qute fr Services. Create and manage an internal alias fr cmmunicatin with Validatin and Test Engineer. Retain verall respnsibility fr any business prcess impact and any prcess change implementatins. Utilize cmmunicatin and cllabratin tl(s) prvided by Cisc. If Custmer uses nn-cisc prvided cllabratin tls fr hsting meetings, managing dcumentatin,

5 Page 5 f 8 instant messaging, desktp sharing, and cllabrative spaces, prvide Cisc with access. Custmer will prvide names f users wh will have authrizatin t access these tls. Custmer will supprt the implementatin f sftware required t use tls in their envirnment. Validatin and Test Supprt In additin t the General Respnsibilities, Custmer shall prvide the fllwing: Prvide the lw level design dcument describing hw Custmer Netwrk needs t be built and engineered t meet a specific set f technical requirements and design gals. The level f details must be sufficient t be used as input t an implementatin plan. Ensure key detailed design stakehlders and decisinmakers are available t participate during the curse f the service. Prvide r extract additinal infrmatin required in the design effrt (e.g., current and planned traffic characteristics). Infrmatin n Custmer business and technical requirements fr new Sftware releases. Review details f planned changes with Validatin and Test Engineer. Infrmatin n Custmer certificatin prcess and lab testing prcess. Infrmatin n Custmer change cntrl prcess. Infrmatin n any service level agreements r Netwrk perfrmance requirements. Infrmatin n critical applicatins supprted by the Netwrk. Infrmatin n which applicatins are missin-critical and their pririty schemes. Infrmatin n Custmer s plans fr business cntinuance, cnslidatin, and virtualizatin. Infrmatin n expected Netwrk grwth and applicatin mix changes. Infrmatin n any future advanced technlgy implementatins. Fr Onsite Test Supprt, prvide Cisc persnnel with access during Standard Business Hurs t apprpriate Custmer Lab facilities. Designate a single pint f cntact ( Custmer Prject Manager ) fr all issues relating t the Services. Such persn shall be identified in Primary Cntacts and shall be available during Standard Business Hurs. Designate a backup when the Custmer Prject Manager is nt available. Prvide the Cisc PM with a list f designated Custmer rles and respnsibilities fr the Deliverables. Ensure that key Custmer persnnel (such as architecture design and planning, netwrk engineering, netwrk peratins persnnel) are available t prvide infrmatin and t participate in review sessins, wrkshps and ther infrmatin gathering activities. The Custmer PM will als ensure that Cisc is prvided with all infrmatin, data and dcumentatin as Cisc reasnably requires prviding services and cmplying with Cisc s respnsibilities in this Services ffer. This infrmatin includes, but is nt limited t: (i) Infrmatin relating t Custmer s infrastructure, design, business and ther applicable requirements; (ii) Functinal and/r technical dcumentatin relating t such requirements; and (iii) Tplgy maps, cnfiguratin infrmatin and existing and prpsed netwrk infrastructure. Identify the primary and backup Custmer authrized site cntacts that shall be accuntable fr prviding necessary infrmatin, btaining access clearances and shall interface as required with ther rganizatins. Participate in regularly scheduled prject review meetings r cnference calls. Unless therwise agreed t by the parties, ensure that Cisc s request fr relevant infrmatin r dcumentatin needed fr the prject under this service is prvided t Cisc within five (5) business day f Cisc s request, r, if 5 business days is nt reasnably practicable, then as sn as is reasnably practicable. Ntify the Cisc Prject Manager f any Custmer requested schedule changes at least ten (10) business days prir t the scheduled activity, r, if 10 business days is nt reasnably practicable, then as sn as is reasnably practicable. Cisc will use reasnable effrts t accmmdate schedule changes and/r cancellatins made within this ten (10) day windw. Ntify Cisc f any hardware and/r sftware upgrades r any ther changes within the Custmer s envirnment that might affect the perfrmance f services prir t the cmmencement f Services. Prvide Cisc with such access t Custmer Site(s) and facilities as required enabling Cisc t cmply with its bligatins, including where applicable, cmputers, telecm equipment, facilities, wrkspace and telephne fr Cisc s use during the prject. Prvide prper security clearances and/r escrts as required t access the Custmer Site. Prvide security and Internet access t ruters and/r mdems fr utbund access, fr sftware and firmware dwnlads in accrdance with Custmer s access guidelines, prtcls and regulatins. Prvide VPN access t custmer envirnment fr remte access t custmer s envirnment as necessary. It is Custmer s respnsibility t pay fr the shipping t Cisc lcatin and frm Cisc t their wn lcatin.

6 Page 6 f 8 The custmer retains title and risk f lss while the staged equipment are at Cisc s lcatin/lab fr the testing/validatin. Prvide a preliminary Lab envirnment dcuments and slutin validatin and test bjectives. Ensure the identified key persnnel participate in the Lab Strategy meetings. Wrk with Cisc t define the scpe fr the test. Cllabrate with Cisc t identify test cases required and autmatin requirements Identify any issues that may affect the setup and executin f the test plan. Participate and review the Autmatin Plan; and, prvide feedback in rder fr Cisc t make changes t finalize the Autmatin Plan, as necessary. Custmer must adhere t the selected scheduling dates and times. If Custmer must change test scheduling fr any reasn, then Change Management Prcedures wuld apply. Review the test cases and Autmatin scripts and prvide feedback t Cisc as required. Prvide Cisc persnnel with access during Standard Business Hurs t apprpriate Custmer Lab facilities.

7 Page 7 f 8 Appendix A Service SKUs The fllwing list f validatin and test services SKUs and Deliverables with Tags: Architecture Name f Categry / Mdule SKU Deliverables Validatin-Test Cycle and Review Standard (OPT-VT-NGN TCR MI) Validatin-Test Cycle and Review Dedicated (OPT-VT-NGN TCR MA) Validatin and (OPT-VT-NGN IM) CON-AS-TEST- (OPT-VT-NGN OS) NGN Test Services fr NGN (OPT-VT-NGN TLSR) NGN (OPT-VT-NGN TEST) (OPT-VT-NGN PM) (OPT-VT-NGN ST) Validatin-Test Cycle and Review Standard (OPT-VT-BN TCR MI) Validatin-Test Cycle and Review Dedicated (OPT-VT-BN TCR MA) Validatin and (OPT-VT-BN IM) Brderless (OPT-VT-BN OS) Test fr CON-AS-TEST-BN NOS (OPT-VT-BN TLSR) Brderless NOS (OPT-VT-BN TEST) (OPT-VT-BN PM) (OPT-VT-BN ST) Validatin-Test Cycle and Review Standard (OPT-VT-DC TCR MI) Validatin-Test Cycle and Review Dedicated (OPT-VT-DC TCR MA) Validatin and (OPT-VT-DC IM) (OPT-VT-DC OS) Data Center Test Services fr CON-AS-TEST-DC (OPT-VT-DC TLSR) Data Center (OPT-VT-DC TEST) (OPT-VT-DC PM) (OPT-VT-DC ST) Validatin-Test Cycle and Review Standard (OPT-VT-COL TCR MI) Validatin-Test Cycle and Review Dedicated (OPT-VT-COL TCR MA) Validatin and (OPT-VT-COL IM) (OPT-VT-COL OS) Cllabratin Test Services fr CON-AS-TEST-COL (OPT-VT-COL TLSR) Cllabratin (OPT-VT-COL TEST) (OPT-VT-COL PM) (OPT-VT-COL ST) Validatin-Test Cycle and Review Standard (OPT-VT-MI TCR) Validatin-Test Cycle and Review Dedicated (OPT-VT-MI TCR MA) Validatin and (OPT-VT-MI IM) Mbile (OPT-VT-MI OS) Test Services fr CON-AS-TEST-MI Internet (OPT-VT-MI TLSR) Mbile Internet (OPT-VT-MI TEST) (OPT-VT-MI PM) (OPT-VT-MI ST) Validatin-Test Cycle and Review Standard (OPT-VT-SEC TCR MI) Validatin-Test Cycle and Review Dedicated (OPT-VT-SEC TCR MA) Validatin and (OPT-VT-SEC IM) Enterprise Test Services fr (OPT-VT-SEC OS) CON-AS-TEST-SEC Security Enterprise (OPT-VT-SEC TLSR) Security (OPT-VT-SEC TEST) (OPT-VT-SEC PM) (OPT-VT-SEC ST) Validatin-Test Cycle and Review Standard (OPT-VT-SPVID TCR MI) Validatin-Test Cycle and Review Dedicated (OPT-VT- SPVID TCR MA) Validatin and (OPT-VT- SPVID IM) CON-AS-TEST- (OPT-VT- SPVID OS) SP Vide Test Services fr SPVID (OPT-VT- SPVID TLSR) SP Vide (OPT-VT-SPVID TEST) (OPT-VT-SPVID PM) (OPT-VT-SPVID ST) Mbility Validatin and CON-AS-TEST- Validatin-Test Cycle and Review Standard (OPT-VT-MOB TCR MI) Cntrlled Dc. # EDM Ver: 5.0 Last Mdified: Tue Feb 27 00:21:22 PST 2018 CISCO PUBLIC INFORMATION, Validatin_Testing_Optimizatin_Services.dcx

8 Page 8 f 8 Enterprise Wireless LAN SP Security Test Services fr Mbility Validatin and Test Services fr Enterprise Wireless LAN Validatin and Test Services fr SP Security MOB CON-AS-TEST- WLAN CON-AS-SPSEC- TEST Validatin-Test Cycle and Review Dedicated (OPT-VT-MOB TCR MA) (OPT-VT-MOB IM) (OPT-VT-MOB OS) (OPT-VT-MOB TLSR) (OPT-VT-MOB TEST) (OPT-VT-MOB PM) (OPT-VT-MOB ST) Validatin-Test Cycle and Review Standard (OPT-VT-WLAN TCR) Validatin-Test Cycle and Review Dedicated (OPT-VT-WLAN TCR MA) (OPT-VT-WLAN IM) (OPT-VT-WLAN OS) (OPT-VT-WLAN TLSR) (OPT-VT-WLAN TEST) (OPT-VT-WLAN PM) (OPT-VT-WLAN ST) Validatin-Test Cycle and Review Standard (OPT-VT-SPSEC TCR MI) Validatin-Test Cycle and Review Dedicated (OPT-VT-SPSEC TCR MA) (OPT-VT-SPSEC IM) (OPT-VT-SPSEC OS) (OPT-VT-SPSEC TLSR) (OPT-VT-SPSEC TEST) (OPT-VT-SPSEC PM) (OPT-VT-SPSEC ST) Cntrlled Dc. # EDM Ver: 5.0 Last Mdified: Tue Feb 27 00:21:22 PST 2018 CISCO PUBLIC INFORMATION, Validatin_Testing_Optimizatin_Services.dcx