PSTN Interface Options
There are three (3) ways to interface PSTN lines, also known as TDM or PCM data, to the SigC5561 card:
- Separate multi-FSX/FXO, multi-T1/E1 or T3 PCI card(s). In this case, TDM data is transported on the PCI bus, between
cards. Providers of T1/E1 and T3 cards include Digium, Sangoma, SBE, and more. This method is the least expensive and most
flexible, but experiments show that reliable operation is limited to about 500 or so TDM channels over the PCI
bus on 32-bit PCI motherboards.
- Unified multi-T1/E1 or T3 card. In this case, the SigC5561 and another PMC form-factor card are combined on a dual site
PCI carrier card, which allows TDM data to move between the two cards without PCI bus
interaction. A typical dual carrier card
configuration would combine a SigC5561 card and a wanT3
channelized DS3 card. The dual carrier method allows higher channel capacities due to direct inter-card TDM
communication, free from impact of system activities involving the PCI bus. TDM channel capacities up to 2048 full-duplex
channels are possible per SigC5561 card.
-
TDMoIP protocol. TDM-over-IP protocol, also referred to as CESoPSN, may be used. In this case, TDM data is transported
on the GbE interface to the SigC5561 card, where it is "interworked" by the WinPath network processor into TDM format data
and routed to the TDM side of the DSP farm. TDM channel capacities up to 2304 full-duplex channels are possible per
SigC5561 card.
VoIP Feature Summary
Below are VoIP features included with all configurations of the SigC5561 Card.
|
Voice Compression (CODEC) |
G.711 (64 kbps m-law or A-law)
G.711.1 (Appendix A) Packet Loss Concealment
G.722 wideband (48, 56, 64 kbps)
G.723.1 (24, 40 kbps)
G.723.1A
G.726 ADPCM (16, 24, 32, 40 kbps)
G.727 ADPCM
G.728 (16 kbps)
G.729 (8 kbps)
G.729AB (8 kbps)
G.729D (6.4 kbps)
G.729E (11.8 kbps)
GSM FR, GSM EFR, GSM AMR
EVRC
SMV
iLBC
QCELP13
FAX
T38U
CID
CONF |
|
Echo Cancellation |
G.165 and G.168 64 msec nominal. Up to 128 msec
with multiple reflection cancellations; includes Telogy
proprietary enhancements |
|
Jitter Buffer |
Packet playout unit; Telogy packet-loss mitigation options |
|
Silence Suppression |
VAD, CNG, Telogy proprietary
G.723.1A
G.729AB
GSM FR
GSM EFR |
|
Fax Relay / Pass-Thru: |
T.38 TCP/IP
FRF.11
AAL2 I.366.2
V.17 @ 7.2, 9.6, 12, 14.4 kbps
V.27ter @ 2.4, 4.8 kbps
V.29 @ 7.2, 9.6 kbps
T.30 |
|
Modem Relay / Pass-Thru: |
V.92
V.90
V.34
V.32bis
V.22bis
V.21
V.23
Bell 212, 103
V.42 MNP 2-4, V.44 MNP 5
Modem Transparency: auto-switch from G.7xx to G.711
on fax or modem detection |
|
ISDN |
Sync-mode PPP, HDLC framed PPP
V.110
56k rate adaptation |
VoIP
Standards
Compliance |
RTP
RTCP per RFC 1889/1890/2508
UDP/IP header |
|
Security |
SRTP (RFC 3711) |
|
In-Band Signaling / Call Processing |
DTMF, MF R1, MF R2, MFC, SS7 COT, SF, Call Progress for T1 CAS |
|
Out-of-Band Signaling / Call Processing |
DTMF Relay (RFC 2833) |
|
Rx, Tx Gain Control |
Programmable ±31 dB |
Following Features Require Optional Network Processor
|
TDM Protocols |
CESoPSN (TDMoIP)
H.110 subset (also known as CTbus) |
VoATM
Standards
Compliance |
AAL0 (raw cell)
AAL1
AAL2 I.366.2 |
|
Network Packet Switching |
Example: G.729AB / RTP G.726 / AAL2 |
|
Packet Aggregation and Processing |
Running default Control Path Software (CPS) and Data
Path Software (DPS) builds, the WinPath 747 or 787
Communications and Network Processor provides:
ATM Adaptation layers AAL0, AAL1, AAL2 and AAL5
ATM traffic
shaping M traffic shaping M traffic shaping M traffic shaping for CBR, VBR,
GFR and UBR, compatible with ATM Forum TM-4.1
Up to 64k simultaneous channels (VC or VP) with per-VC queuing
ATM cell and CPS switching up to 622 Mbps full duplex
AAL1
-- supports structured and unstructured Circuit Emulation Services (CES
2.0) ATMF-0078
IMA -- Inverse Multiplexing over ATM in one or more IMA groups according to
ATMF 0086.001
IP Termination -- support for IPv4 (including TOS, TTL, Header processing).
IP Routing -- support for IPv4, RFC 1812 (including TOS, TTL, Header
processing)
IP Interworking
Per flow WFQ and shaping
Routing and forwarding over ATM (RFC 1483/2684)
IP routing and forwarding over PPP (RFC 2364/2472) and PPP-Mux (RFC 1661)
Supports IPv4 IP routing and forwarding over Ethernet (RFC1042)
IP Classification -- supports Multi-field Classification and Differentiated
Services according to RFC 2474 and 2475. Algorithmic with single or multiple
passes (without external CAM)
|
Software Support
Asterisk software support includes Linux drivers and install scripts. For open
source VoIP and application-specific programming,
DirectDSP software is
available that allows host C/C++ programming interface to the card. WinXP and
Win9x drivers and Win version of DirectDSP software are also available.
The SigC5561 card may also be used with applications other than Asterisk; the C5561 card driver and API fully support user-defined application software.
Channel Capacity Table
The table below gives channel capacities for available configurations of the SigC5561
card, including 2 DSPs, 7 DSPs, and 12 DSPs. Note that all channels include 64 msec
echo cancellation.
|
Description |
Codec
|
2 DSPs
|
7 DSPs
|
12 DSPs
|
| ITU Codecs
| G.729
G.723
G.726
G.711
G.711 App 1
Fax, T38 |
192
144
192
384
336
384 |
672
504
672
1344
1176
1176
|
1152
864
1152
2304
2016
2016 |
GSM Codecs
|
GSM FR
GSM EFR
GSM AMR |
144
144
144 |
504
504
504
|
864
864
864 |
CDMA Codecs
|
EVRC
SMV
QCELP13 |
96
96
96 |
336
336
336 |
576
576
576 |
Cable Codecs |
iLBC
G728
G729E
Fax, T38 |
96
96
96
192 |
336
336
336
672 |
576
576
576
1152 |
Simultaneous Call Capacity Table
The table below gives IP-to-IP simultaneous call figures assuming one
call leg is G.711. "IP-to-IP" is typically referred to as transcoding.
Note that G711 leg includes 64 msec echo cancellation, if required by the application.
|
Description |
Codec
|
2 DSPs
|
7 DSPs
|
12 DSPs
|
| ITU Codecs
| G.729
G.723
G.726
G.711 App 1
Fax, T38 |
192
144
192
336
384 |
672
504
672
1176
1176
|
1152
864
1152
2016
2016 |
GSM Codecs
|
GSM FR
GSM EFR
GSM AMR |
144
144
144 |
504
504
504
|
864
864
864 |
CDMA Codecs
|
EVRC
SMV
QCELP13 |
96
96
96 |
336
336
336 |
576
576
576 |
Cable Codecs |
iLBC
G728
G729E
Fax, T38 |
96
96
96
192 |
336
336
336
672 |
576
576
576
2016 |
For transcoding between "asymmetric" LBR codecs, where both call legs are not
G711, channel
capacity is typically reduced by half. This situation is sensitive to various application-specific factors; for more information, please
call or email to discuss with Signalogic engineers.
Download Reference Guide
Specifications
Below are specifications for the SigC5561 card. All specifications are subject to change.
|
Dimensions
|
4.3 x 7.44 x 0.5" (109 x 189 x 12.7 mm)
Length measured from surface of back-plate, height measured from
surface of motherboard, width less than single slot
|
|
DSP Farm
|
Up to 12 Texas Instruments TNETV3010 devices with
Premium Carrier Grade Telogy Software; includes indemnification
of essential patents for conformance & interoperability |
|
Optional Network Processor |
Wintegra WinPath 747 or 787 Access Packet Processor |
|
PCI Bus Interface |
32-bit, 33 MHz PCI; 3.3V signaling with passive adapter, 5V signaling with active adapter |
PCIe Bus Interface |
4x or higher, up to 133
MHz clock rate,
differential signaling per PICMG v1.3, active adapter including PCIe-to-PCI
bridge
|
|
Power Consumption
|
10W in 2 DSP configuration
16W in 7-DSP configuration
23W in 12 DSP configuration** |
|
Temperature |
Operating: |
0șC to 55șC (airflow >200 LFM) |
|
|
Storage: |
-40șC to 85șC |
|
Humidity
|
Operating: |
10 to 90% non-condensing |
|
|
Storage: |
5 to 95% non-condensing |
|
Designed to Meet |
FCC Part 15 Subpart B
EN55022
EN55024
UL60950 3rd edition
UL60950 3rd edition |
Per Channel Pricing
Pricing for the SigC5561 card starts at about $15.60 per channel (for example, 192 G.729
+ echo channels), scales to about $9.5 per channel (672 G.729 + echo channels), and then
scales to about $7.54 per channel (1152 G.729 + echo). These figures are for small
quantity (5 or less); additional price reductions are possible with higher quantity.
Using TDM-to-IP G.711 + 64 msec echo as an example, pricing starts at
about $7.80 per channel for 384 channels, and drops to about $3.77 at
2304 channels.
Unlike a PC software situation, no per-channel royalty cost is required; all IP fees
are embedded within the hardware cost, and in turn within the Texas Instruments voice
chip cost.
** Worst-case figures, measured under full load "stress conditions" with voice software running LBR codec and 64 msec on all channels
Asterisk is a trademark of Digium, Inc.
