Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 143
Sutron’s GPRS service is supported by T-Mobile and AT&T and their roaming
partners in the United States. The TGPRS plan is the standard one to use in the
US. This plan uses T-Mobile infrastructure. The WGPRS plan expands the
footprint by supporting AT&T and roaming partners. International customers
should use the WIGPRS plans. These plans are partitioned by zones depending
on the country and carrier that will be used. (See
International Zones
).
GPRSLink-1 and HSPALink-1 use the same modem and will be identified
internally as “HSPA” for both types. This modem will operate on HSPA where
available and fallback to GPRS in regions that support GPRS but not HSPA. Note
that this functionality is completely transparent to the end user and does not
require any extra input from the user
15.1.3.
CDMA
CDMA is a service offered in the United States and several other countries.
CDMA competes with GPRS for cell phone services. The most common CDMA
providers in the United States are Sprint and Verizon. These companies have
developed extensive networks to support mobile communications. Some
locations may have better coverage with CDMA vs. GPRS, and that is why it is
important to consider when planning your communications system.
The modem for CDMA is different from the one for GPRS communications. Be
sure to determine and confirm coverage and provider (Sprint or Verizon) before
deciding which model to order.
CDMA modems do not have a removable SIM card. Instead, they have internal
identification information that defines the modem on the network. Modems
