SDM-9220/9230 - Comtech EF Data
SDM-9220/9230 - Comtech EF Data
SDM-9220/9230 - Comtech EF Data
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7.2 Voice Channels<br />
Networking Features<br />
• Voice compression algorithms: ACELP-CN (8K/6K), G.729/G.729A (8K), G.711<br />
(PCM 64K), G.723 (low 5.3K/high 6.4K), G.726 (ADPCM 16K/24K/30K/40K)<br />
• Dialing: Multi-Frequency (MF), Dual Tone Multi-Frequency (DTMF) or Pulse<br />
• Line activation: dedicated or switched<br />
• Fallback: buffering scheme for packetization of DSP packets:<br />
Compression Packetization Fallback (Buffering)<br />
ACELP-CN 8K and 6K<br />
(configurable)<br />
G.723 6.4K and 5.3K<br />
(configurable)<br />
up to 5<br />
up to 3<br />
G.726 16K 16K none<br />
G.726 24K 24K none<br />
G.726 32K 32K none<br />
G.726 40K 40K none<br />
G.729, G.729A 8K up to 8<br />
PCM64K 64K up to 2<br />
Table 7-1: Packetization of DSP packets<br />
• Signaling: E&M 4w/2w (Type I, II and V) Immediate Start, Wink Start; Loop<br />
Start and Ground Start FXS (OPX) and FXO (SLT), ISDN-BRI, ISDN-PRI,<br />
QSIG, custom signaling; software configurable<br />
• Voice/fax line impedance: 600/900 ohms or complex<br />
• Echo cancellation: CCITT G.165<br />
• Fax Relay: Group III FAX 4.8, 7.2, 9.6, 12.0, 14.4 Kbps, over PowerCell. Super<br />
G3 configurable to passthrough or fallback to G3. Group IV fax and other nonvoice<br />
bearer ISDN channel at 64K<br />
• Fax signal types: V.21 channel 2, V27ter 2400 bps, V27ter 4800 bps, V29 7200<br />
bps, V29 9600 bps, V33 12000bps, V33 14400bps, V17 7200bps, V17 9600bps,<br />
V17 12000bps, V17 14400bps<br />
• Modem Relay: V.32bis demodulation up to 14.4 Kbps, modem passthrough<br />
(G.711) for other modem types<br />
• Encoding: Mu-law or A-law<br />
Memotec Inc. 7-3
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