Job Information

- Date Opened 10/13/2026
- Job Type Full time
- Industry IT Services
- City .
- State/Province .
- Country India
- Zip/Postal Code .

Job Description

Job Description:

Senior Voice / Collaboration Engineer
Job Description
Experience 8+ years
Primary Focus Local CUCM, SIP/PSTN, CUBE, Unity and site voice migration
Work Model Remote with onsite support for larger/critical site cutovers where required
Role Summary
Senior hands-on engineer responsible for implementation, migration and cutover of the local Cisco voice
environment. The role requires deep experience with CUCM, SIP/CUBE, PSTN services, endpoint migration,
carrier coordination and site-level voice dependencies.
Key Responsibilities / Implementation Scope

- Build and configure the local/on-premises Cisco Unified Communications workplace, including CUCM

Publisher and Subscribers, Cisco Unity Connection, CUBE/voice gateways, device pools, regions,
locations, partitions, Calling Search Spaces, route groups, route lists, route patterns, translation patterns
and dial plans.

- Configure and validate SIP connectivity and call routing between CUCM, CUBE, carriers, contact-center

platforms and other voice systems.

- Support setup and testing of new SIP/PSTN services and coordinate with carriers for circuit activation,

DID allocation, number porting and production service validation.

- Configure and troubleshoot CUBE and voice gateways, including dial peers, SIP profiles, codec

negotiation, DTMF, RTP/SRTP, TLS, media flow and number manipulation.





- Migrate and re-register Cisco IP phones, softphones, conference devices and other VoIP endpoints into

the NewCo voice environment.

- Configure and validate voice VLANs, DHCP options, DNS/NTP dependencies, QoS policies, gateway

connectivity and network reachability required for voice services.

- Migrate DIDs, extensions, toll-free numbers, voicemail boxes, auto attendants, hunt groups, callforwarding rules and call-routing configurations.

- Support Five9/contact-center integration, including SIP connectivity, DID routing, inbound/outbound

customer call flows, failover and end-to-end call validation.

- Validate and migrate analog lines, fax, paging/PA systems, emergency or site-specific voice

dependencies where applicable.

- Execute site-by-site cutovers covering pre-cutover validation, endpoint migration, number-porting

coordination, testing, rollback support, issue resolution and hypercare.

- Provide onsite implementation support for larger/critical sites and remote deployment support for smaller

sites as required.

- Troubleshoot using CUCM RTMT, CUBE/IOS logs, SIP traces, packet captures, debugs and call-detail

records.
Required Technical Skills
Area Required Hands-on Experience




Cisco Collaboration
CUCM Publisher/Subscriber, Cisco Unity Connection, Cisco IP Phones, devicregions, locations, partitions, CSS, route patterns, route lists/groups, translatipatterns and SRST concepts.
SIP / CUBE SIP trunks, dial peers, SIP profiles/normalization, DTMF, codec negotiation,
RTP/SRTP, TLS, media flow and carrier integration.
PSTN / Numbering PSTN services, DIDs, toll-free numbers, number porting, inbound/outbound cand carrier coordination.
Network Dependencies Voice VLANs, DHCP, DNS, NTP, QoS, gateway connectivity, routing and pac
troubleshooting.
Contact Center / Legacy Voice Five9 integration, analog gateways/lines, fax, paging/PA and site-specific teledependencies.
Migration & Cutover Site migration planning, cutover execution, rollback, testing, hypercare and as
documentation.
Certification Requirements
Mandatory: Cisco voice/collaboration certification required. Acceptable senior credentials include Cisco
Certified Specialist - Collaboration Core (350-801 CLCOR), CCNP Collaboration, or CCIE Collaboration.
Preferred / Advantageous: Relevant Collaboration concentration credentials such as CLACC/CLHCT and
prior enterprise voice migration experience.
Required Deliverables

- Low-level design / configuration workbook

- Implementation runbook / Method of Procedure (MOP)

- Site cutover and rollback plans

- Voice test scripts and validation evidence

- As-built configuration and operational handover documentation

📌 Senior Voice / Collaboration Engineer (India)
🏢 ElfOnze Technologies
📍 India