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
HP 8120-6195 - RS-232C serial interface cable - 62-pin (M) to eight 3-pin (F) ATP RS-232C connectors - 3.0m (9.8ft) long Retail