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E1 last mile

An operator needs to deliver a reliable E1 to the client over a modern IP network — without TDMoP quirks and with SoftSwitch support. The Alvis-GW-2E1-L is built exactly for this.

Alvis-GW-2E1-LFree 2-month evaluation
How it works

Client E1 over the operator SIP network

Hover a node — we explain what it does. The dots show calls passing through.

E1 / PRI (TDM)SIP / IP
E1 / PRI SIP Client · E1 — The subscriber connects over E1 "like the old days"; their PBX can be configured to the operator requirements.Client · E1PBX / equipmentAlvis-GW-2E1-L — A desktop E1↔SIP gateway: full 30 connections, echo cancellation G.168+ 128 ms, codecs G.729/G.723/AMR-NB/GSM-FR, T.38. Resilient to power outages and packet loss.Alvis-GW-2E1-LE1 ↔ SIPOperator SIP network — SoftSwitch compatibility over SIP; stable operation over Ethernet with jitter/loss tolerance.Operator SIP networkSoftSwitch
Hover a node on the scheme — we will show what each element does.
What the operator’s client wants
  • A reliable E1 connection "like the old days".
  • Operation even under sometimes-poor power conditions.
  • Sensible pricing per stream.
  • Sometimes an unwillingness to modernise the office PBX at their own expense — easier to just take a stream.
  • The option to tune their PBX to meet operator requirements.
What the telecom operator wants
  • Affordable yet reasonably reliable equipment with support.
  • Compatibility with the operator SoftSwitch (SIP).
  • An SSS certificate.
  • Stable operation over the operator Ethernet network, tolerant to jitter and packet loss.
  • Security of the deployed solution and its autonomy.
  • Sensible, adequate support from the equipment vendor.
  • The ability to quickly replace and upgrade depending on client needs.

The client’s and the operator’s wishes are sometimes opposite but generally understandable. Lately this is compounded by the overall trend toward import substitution with domestic equivalents while preserving the required functionality and reliability.

Solution: Alvis-GW-2E1-L

GarantPlus developed the Alvis-GW-2E1-L model specifically for the needs of telecom operators. It comes in a desktop form factor, at a low price and with excellent, time-proven hardware reliability. The low price is achieved by optimising components precisely for SIP↔E1 connections.

  • The gateway runs Asterisk with SIP and connects correctly to most operator SoftSwitches.
  • Works reliably through power outages, network packet loss and jitter.
  • Hardware echo cancellation G.168+ up to 128 ms — no echo even when other elements’ echo cancellers are misconfigured.
  • Russian development with American roots — a proven hardware design, quality and reliability.
  • A full 30 SIP/E1 connections, T.38 and most codecs (G.729, G.723, AMR-NB, GSM-FR…).
Why it pays off for the operator
  • 5 years of warranty and support on all matters, including compatibility with client equipment.
  • Free delivery to any corner of Russia and the CIS.
  • SSS declaration available.