Reference Manual

Speech and Data Services

24.4.3 Half Rate Speech

The round-trip delay for a half rate speech channel, introduced by the

BTS, is less than 63 ms.

The values are including additional delay due to the measuring method

as described in /GSM 11.20:7.2.6, table 7–2b/.

24.4.4 Half Rate Data

Transparent data services supported:

•

4.8 kbits/s

•

2.4 kbits/s

•

1.2 kbits/s

• 1200/75 bits/s

•

600 bits/s

Non-transparent data services supported:

•

4.8 kbits/s

The round-trip delay for a half rate data channel, introduced by the BTS

is:

•

Less than 284 ms for TCH/H4.8 and TCH/H2.4(this includes

TCH/H1.2, TCH/H1.2/75 and TCH/H0.6 as well)

•

Less than 315 ms for TCH/H4.8NT.

The values are including additional delay due to the measuring method

as described in /GSM 11.20:7.2.6, table 7–2b/.

EN/LZT 720 0008 P2A

2001-11-28

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Preliminary