McFarland, WI - January 2004 - The 1Call Division of AMTELCO is pleased to announce that
AMTELCO has received certification with the Siemens HiPath 4000, with Cornet-NQ, and the 1Call
Infinity system. This integration was accomplished using the AMTELCO XDS T1/E1 PRI ISDN board,
which can accommodate either four or eight spans. This board supports the Q Signaling Interface
Protocol (QSIG), allowing it to integrate with QSIG-compatible switches.

QSIG is an international, vendor-independent signaling standard for logical signaling between two
private switch nodes, such as PBXs. QSIG links multiple vendors’ PBXs while retaining feature
transparency. Supplementary services offered by QSIG include name identification, call intrusion,
do not disturb, path replacement, operator services, mobility services, and call completion on no
reply.

The AMTELCO XDS T1/E1 PRI ISDN board provides digital connections with a PBX or central office
switch. These digital connections offer high port volumes, very fast call processing, and sophisticated
features. The 1Call Infinity system features seamless integrations with existing legacy systems at
hospitals, giving easy access to overhead paging systems, PBXs, paging terminals, and much more.

For more information on Infinity and the Siemens PRI ISDN Cornet-NQ Certification, contact the
1Call Division of AMTELCO at (800)356-9148, or (608)838-4194, or send an e mail to info@1call.com.