The Norstar system is no longer produced by Nortel and branded as the "Nortel Norstar" system. The recommended migration path from the Norstar to a full VOIP/SIP system is the BCM, which is short for Business Communication Manager. There are two systems available, the BCM50 for smaller enterprises with 3-30 extensions and the BCM450 which allows up to 300 sets. After Avaya's acquisition of Nortel's Enterprise Division, it announced that the Norstar and BCM systems would continue being manufactured, but under the Avaya name. According to Avaya, the Norstar/BCM systems and telephone sets would eventually integrate with the Avaya IP Office via Avaya Aura. Nortel features and programming would be preserved, but would accompany Avaya features and programming as well.