HP 40299-69021 - HP-PB 8 channel RS-232C MUX interface - HP-PB 8 Channel RS-232C MUX Interface (P/O 40299B) Retail
HP 40290-60007 - Loopback connector - For 50-pin RS-232C connector - For testing all ports on the RS-232C ATP 37/M PC board Retail