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Systems Administrator (Asterisk 1.4 & Linux Specialization)
Connect it Networks Laval, Quebec
Permanent
Full time
85,000.00$ - 100,000.00$ Yearly
As soon as possible
Description
Position Overview
Key Responsibilities
• Asterisk 1.4 & Telephony Specialization:
Required Qualifications & Technical Skills
Asset / Nice-to-Have Qualifications
- We are seeking a versatile Systems Administrator with hands-on expertise in Linux infrastructure, virtualization, and legacy open-source telephony, specifically Asterisk 1.4. In this dual-capacity role, you will maintain and optimize internal server infrastructure while serving as a core operational and technical resource for our residential VoIP telephony ecosystem. You will work closely with our primary Systems Administrator and technical team to manage virtual machines, automate backups, troubleshoot low-level SIP/RTP telephony issues, and maintain mission-critical dialplans and call routing.
Key Responsibilities
- • Systems & Infrastructure Administration:
- Server Maintenance: Administer, patch, and monitor Linux (Debian, CentOS/RHEL, Ubuntu) and Windows server environments.
- Virtualization & Storage: Deploy, configure, and maintain virtual machines, storage volumes, and resources across hypervisors (VMware ESXi, Proxmox).
- Backups & DR: Maintain automated backup systems, test disaster recovery routines, and verify snapshot integrity.
- Automation: Develop shell scripts (Bash, Python) to automate routine maintenance, log parsing, and administrative tasks.
- Support & Escalations: Provide Tier-2/Tier-3 infrastructure escalation support for internal systems, user access, and identity management.
• Asterisk 1.4 & Telephony Specialization:
- Legacy Asterisk Management: Maintain, debug, and configure legacy Asterisk 1.4 PBX environments, including flat-file configuration structures (extensions.conf, sip.conf, iax.conf, voicemail.conf, etc.).
- Dialplan & Routing Architecture: Write, modify, and optimize dialplans using native Asterisk 1.4 syntax, application macros, custom contexts, and AGI scripts (Perl, PHP, or Python).
- VoIP Diagnostics & Protocols: Diagnose SIP signaling, NAT traversal, codec negotiation (G.711u/a, G.729), one-way audio, and RTP jitter using Wireshark and sngrep.
- Endpoint Provisioning: Provision, configure, and support residential Analog Telephone Adapters (ATAs like Grandstream, Cisco/Linksys SPA) and SIP endpoints.
- Trunk & Carrier Interconnect: Monitor trunk stability, DID routing, channel density, CDR database logging (MySQL/MariaDB), and voicemail storage.
Required Qualifications & Technical Skills
- 3+ years of professional systems administration experience in enterprise or service-provider Linux environments.
- Demonstrated hands-on experience managing and troubleshooting Asterisk (specifically legacy Asterisk 1.4 or 1.8 flat-file configurations without reliance on modern GUIs like FreePBX).
- Strong understanding of telephony protocols: SIP, RTP, RTCP, SDP, IAX2, along with NAT traversal techniques (STUN, TURN, ICE, externip/localnet parameters).
- Proficiency in network packet inspection tools (Wireshark, tcpdump, sngrep) for VoIP signaling and media stream diagnostics.
- Solid experience with hypervisors (VMware ESXi, Proxmox VE, or KVM) and network services (DNS, DHCP, NTP, SSH, SSL/TLS certificates).
- Competence in relational databases (MySQL, MariaDB) for Asterisk CDR and application data queries.
- Strong scripting skills (Bash, Python, or PHP/Perl for AGI scripts).
- Strong problem-solving ability, documentation hygiene, and ability to handle on-call operational escalations.
Asset / Nice-to-Have Qualifications
- Experience with newer Asterisk versions (16/18/20) and modern PJSIP architecture.
- Familiarity with Kamailio, OpenSIPS, or Session Border Controllers (SBCs).
- Knowledge of networking fundamentals: VLANs, QoS (DSCP/CoS prioritization), and firewall filtering.
- Relevant technical certifications (LFCS/RHCSA, dcap - Digium Certified Asterisk Professional, or CCNA).
Requirements
- Essential - Bilingual French - English
- Essential - Systems Administration experience with Linux and Windows
- Essential - Expertise with Asterisk
- Essential - Must be flexible in case of work emergencies
- Essential - Knowledge of dial plan architecture for Asterisk
Knowledge and abilities
- Important - Organized, results-driven and multitasking
- Important - Prioritize and execute tasks in a fast-paced env.
- Important - Strong at problem-solving and documentation
- Important - Research and troubleshooting a wide range of issue
- Important - An excellent communicator (written and oral)
Salary benefits :
Laptop, Allocation Cellulaire, Assurances Collectives
Connect it Networks
Connect it Networks brings people and opportunities together. Driven by a desire to increase employee productivity and technological efficiency, we are making business communications more accessible than ever. Knowledge, experience, and quality...
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