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Welcome to ISPTrader, specializing in Cisco AS5300, AS5350, AS5350XM, AS5400, AS5400XM, and AS5850 gateways plus other routers and switches. 

POTS (Ordinary Phone Line) Type v.34 Dialup Gateways

   Contents
• Introduction (Right)
• Cisco modular routers for POTS gateways 
• USR/3Com Netserver
• USR/3Com Total Control Analog Hub
 • POTS gateway pricelist
• Cisco product documentation - 8AM & 16AM gateways
• USR/3Com Netserver documentation
• 3Com Total Control Documentation
When PRIs are unavailable or undesirable, ordinary phone lines (POTS lines) can be used as dialin/dialout trunks for remote access gateways. In this section we consider their use for dialup data access, but it is also possible to use ordinary phone lines to build small VOIP networks. In contrast to simple modem pools, which must be cabled to terminal servers, POTS integrated dialup gateways include modem pool, routing, and authentication capabilities in a single piece of equipment. For dialup data gateways - for example in creating a network allowing either dialup internet or intranet access - ordinary phone lines can be connected to special analog modem modules that are installed in routers. Among Cisco routers, the 2600, 2600XM, or 3600 series are all good choices when provisioned with one or more NM-8AM (AM for 'analog modem') or NM-16AM (pictured here), or the newer version 2 of either card, to provide V34 dialup access to the internet or company intranet (note that PRI trunk lines are required for V90 and V92 speeds - maximum analog dialup speeds are V34/33,600) For up to 16 analog dialin connections, the 2600 series is sufficient (it has just 1 NM slot), while the 3640 could be used for 32, and the 3661 or 3662 could support up to 96 (up to six NM-16AM cards).

3Com offers two other widely deployed solutions. One small, elegant, and high-quality analog gateway is the Netserver 8 or Netserver 16. Branded 'USR', it includes 8 or 16 courier-class analog modem connections, incorporates built-in routing and authentication capabilities, and has a 10-base ethernet connection. It is particularly useful internationally because of the well-known abilities of the courier modems to establish and maintain connections under bad line conditions. Another offering by 3Com is the Total Control Analog Hub. This unit is similar to the Total Control 1000 - in fact based upon the same platform and hardware, but uses analog POTS NIC cards to provide up to 60 analog phone connections. This unit would be configured with power supplies, a netserver router card set, an NMC card set, and quad modem Nacs with analog POTS Nic cards (up to 60 total dialup ports). While rugged and highly modular, it is more difficult to program and configure than the Netserver.
Introduction: The most common type of trunking used by dialup gateways is PRI ('primary rate interface' digital bundles of individual phone lines). However, for small number of phone lines, or where PRIs are unavailable or too expensive, it is possible to use ordinary phone lines to connect to several dialup gateways that function, otherwise, like a normal, integrated remote access server - that is - including trunking, call processing, and routing onto the ethernet in a single piece of equipment. The best solutions for this type of application are (in order) a Cisco 2600/3600 modular router provisioned with analog modems, a USR Netserver 16, or a 3Com Total Control Analog Hub.
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