TY - BOOK AU - Schmidt, Cheryl A AU - Friend, Ernie TI - IP telephony using CallManager express lab portfolio SN - 1587131765 SN - 200603727 U1 - 004.695 SCH PY - 2007/// CY - Indianapolis, IN PB - Cisco Press KW - CallManager express lab portfolio KW - Internet telephony - Computer programs ER -