• HPE JG431A HMIM voice module with silver circuit board and green components
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HPE

HPE JG431A | HMIM voice module | 2x E1/PRI (G.703/G.704) | CAS and PRI signaling

JG431A

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Description

Provide two E1 digital voice circuits to MSR routers for PBX interconnect, PSTN access, or TDM-to-IP gateway applications. Supports PRI (ISDN) and CAS signaling, with framing per G.704 and physical layer per G.703, enabling flexible integration into legacy and hybrid voice networks. DSP/voice resources on the host platform may be required for transcoding or advanced voice features.

Features

- Dual E1 interfaces for flexible TDM voice connectivity
- Supports both PRI and CAS to match diverse telephony environments
- Standards-based operation for carrier interop
- Seamless integration with router-based SIP/VoIP services
- Scalable approach to migrate from TDM to IP

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

- Form factor: HMIM interface module for MSR routers
- Interfaces: 2x E1 (2.048 Mbps each)
- Standards: G.703 physical, G.704 framing
- Signaling: ISDN PRI (Q.931/Q.921) and CAS (R2/DTMF as regionally applicable)
- Clocking: Network, internal, or external (platform dependent)
- Connector/impedance: RJ-45 120Ω; 75Ω via external baluns (where required)
- Use cases: PSTN access, PBX tie lines, voice gateway to SIP/VoIP
- Requirements: May require platform DSP/voice resources for codecs and echo cancellation
- Management: Provisioned via router voice/ISDN configuration
- Compatibility: MSR platforms with available HMIM slot

FAQs

Q: Does it support both PRI and CAS?
A: Yes, it supports ISDN PRI and CAS (region-dependent variants).

Q: Do I need additional licenses?
A: Basic port activation typically needs no license; advanced voice features may require platform voice licenses.

Q: Is 75Ω E1 supported?
A: Use appropriate external baluns to convert from 120Ω RJ-45 to 75Ω BNC if required by your carrier.

Q: Can it be used as a voice gateway to SIP?
A: Yes, with the router’s voice features and DSP resources to interwork TDM and SIP.

Q: How is clocking handled?
A: Network or internal clocking can be selected; follow best practices to avoid slips.

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