Meanwhile, Integrated Services Digital Network (ISDN) will also be increasing rapidly.

同时，综合业务数字网(ISDN)将继续保持快速的增长。

youdao

Integrated Services Digital Network (ISDN); Signalling Systim No. 7; Operation Mainterance and Administration Part (OMAP); Part 1: Protocol specification.

综合业务数字网(ISDN)； 7号信令；操作、维护和管理部分(OMAP)，第1部分：协议规范。

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Integrated Services Digital Network (ISDN); Signalling Systim No. 7; Signalling connection Control Part (SCCP) [connectionless and connection-oriented] to support international interconnection.

综合业务数字网(ISDN)； 7号信令；支持国际互连信令连接控制部分(SCCP)[无连接和定向连接]。

youdao

In October the company launched its global area network (GAN), which offers a mobile integrated services digital network (ISDN), ideal for video conferencing, image transfer and high-quality voice transmission.

FORBES: Down To Earth