"external call" is a correct and usable term in written English.
You can use it when referring to a call coming from someone or something outside a specific organization. For example, "We received an external call about a potential project."
Internal and external call centres working in the whole range of task complexity were compared.
The Internal Call Manager is responsible for the communication with other π-Box components while Listener and External Call Manager cover the communication with external resources.
The new module could also be integrated in Open-edX by an external call to another scenario editor obtained by specializing the TELOS editor used in section "Personalization of massive open online courses".
The re-configured Quitline Service involved discontinuing the use of an external call centre and having all incoming calls answered directly by the Quitline Advisors.
The modified NJst method, called the MEst method, was implemented in R [ 73] with an external call to fastME [ 76] for the calculation of the minimum evolution criterion.
A year later, the FCC woke up and voted to allow carriers to offer their customers external call-blocking apps like Nomorobo on their landlines.
Organizations like Shinsei Bank and Tokyo Gas have begun using it for internal communications and some external calls.
President Obama is correct when he resists the internal and external calls for the United States to become more deeply involved.
Unfortunately, while various solution algorithms exist for MDP-IPs, they often require external calls to optimization routines and thus can be extremely time-consuming in practice.
In this setting, flexible code reuse can be combined with modular reasoning about external calls in the sense that each class is analyzed only once.
In recent years, The Times's top editors had resisted periodic external calls that they hire an ombudsman -- at a time when about three dozen other papers created variations of such positions.
