cpmActiveModemSlot 1.3.6.1.4.1.9.10.19.1.3.1.1.6

Identification of modem resource allocated to call. This is the value of cmSlotIndex from CISCO-MODEM-MGMT-MIB. This value along with cpmActiveModemPort uniquely identifies a modem. Value is -1 if call does not utilize a modem.