Description
The AudioCodes Mediant 1000B M1KB-D1-2AC combines the entry-level T1/E1 configuration of the D1 with the power redundancy of the dual-PSU chassis. One T1/E1 span is pre-installed for immediate SIP trunking deployment — up to 23 simultaneous channels on T1 or 30 on E1 — while two AC power supplies operate in active/standby mode so a PSU failure never takes the gateway offline. Five expansion bays remain open for future modules. This is the right choice when you're starting with a single T1 or E1 but need carrier-grade reliability from day one.
The Telecom Spot Take
The practical difference between the M1KB-D1 and the M1KB-D1-2AC comes down to risk tolerance. A single PSU is an acceptable risk in low-criticality environments; in a site where voice service is a revenue-generating function or a compliance requirement, it's an unnecessary exposure. The dual-PSU configuration means your single T1/E1 gateway keeps running through a power supply failure — no emergency parts order, no scramble to find a spare, no downtime. The five open bays mean this chassis can grow with your organization: add T1/E1 modules as call volume increases, or add analog modules for departments that still need FXS connectivity. The dual-PSU investment pays for itself the first time it silently absorbs a supply failure that nobody notices because the calls never dropped.
Key Features
- 1 T1/E1 span pre-installed: Up to 23 channels (T1) or 30 channels (E1) — ready for SIP trunking immediately upon installation.
- Dual AC redundant power: Active/standby PSU configuration — one supply fails, the other takes over instantly with zero voice service interruption.
- 5 open expansion bays: Scale to additional T1/E1 spans, BRI, or analog modules without chassis replacement.
- 2 Gigabit Ethernet ports: Dual GE interfaces for SIP connectivity and network-level redundancy.
- E-SBC capable via software license: Same hardware platform can function as a Session Border Controller when licensed.
- SIP, H.323, and MGCP: Multi-protocol gateway support for any VoIP platform or SIP trunking provider.
- T.38 fax relay: Fax over IP on all active channels.
- 1U rack-mountable: Standard 19-inch rack form factor.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | M1KB-D1-2AC |
| Pre-Installed Module | 1 × T1/E1 digital voice module (1-span) |
| Voice Channels (T1) | Up to 23 simultaneous channels |
| Voice Channels (E1) | Up to 30 simultaneous channels |
| Open Expansion Bays | 5 (of 6 total) |
| GE Network Ports | 2 × 10/100/1000Base-T Gigabit Ethernet |
| Power Supply | Dual AC, active/standby redundancy, 100–240V auto-ranging |
| Form Factor | 1U rack-mountable |
| Signaling Protocols | SIP (RFC 3261), H.323, MGCP |
| Voice Codecs | G.711, G.723.1, G.726, G.727, G.729A/AB, iLBC, GSM |
| Fax | T.38 fax relay |
| Echo Cancellation | G.165/G.168 |
| Max Voice Channels (fully populated) | Up to 192 |
| Management | Web GUI, SNMP, EMS, CLI |
| Vendor | AudioCodes |