Tech Bulletin - PortMaster True Digital(TM) Modems with ComOS 3.8 or later Create Date: 10/30/98 To all PortMaster owners with True Digital (TM) modems: This technical bulletin is directed to all owners of PortMaster products with True Digital modems who plan to upgrade or have already upgraded to ComOS releases 3.8 or later. ComOS 3.8 and later releases support V.90, the new 56Kbps ITU standard. The implementation of this new protocol has brought challenges to both client and server modem vendors. Each vendor has made significant effort to meet the needs of interoperability throughout the industry. Each release of a vendor's modem firmware has brought everyone closer to that goal. If you are an access provider preparing to upgrade a PortMaster to ComOS 3.8 or later, Lucent recommends instructing your customers to verify that they have the latest firmware for their client modems. Your customers must ask their modem vendor for a firmware upgrade. Customers with older firmware, including some of the initial V.90 releases, might experience less desirable performance until they upgrade the modem firmware. Modems based on V.34 and older technology are still supported. If a problem persists after you have confirmed that the client modem is running the latest available firmware, contact the Lucent InterNetworking Systems Technical Support Department to open a trouble ticket. If you are a US customer, call 800-458-9966. If you are a Europe, Middle East and Africa (EMEA) customer, call +33 4 92 92 48 48. All other customers from outside the US, call +1-925-737-2100.

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