Specification for dual-tone multi-frequency (DTMF) signalling protocol for social alarm systems
社会报警系统用双音多频(DTMF)信令协议规范
发布日期:
2009-04-30
交叉引用:BS EN 50134-1BS EN 50134-3ES 201 235-1ES 201 235-2ES 201 235-4ITU-T建议G.711:1988购买本文件时可获得的所有现行修订均包括在购买本文件中。
Cross References:BS EN 50134-1BS EN 50134-3ES 201 235-1ES 201 235-2ES 201 235-4ITU-T Recommendation G.711:1988All current amendments available at time of purchase are included with the purchase of this document.