An accessory system (202, 402, 502) for a portable radio transceiver (200) includes an accessory device (206) which includes a speaker and/or a microphone disposed external of the portable radio transceiver. A cable (204) containing two or more conductors is provided for operatively connecting the accessory device to the portable radio transceiver. At least one antenna (210, 212) for the portable radio transceiver is integrated within the cable. When the accessory system is used with a multi-band portable radio transceiver, two or more antennas can be included in the cable, each optimized for operation on a particular RF frequency band.