
The Cisco Fourth-Generation T1/E1 Multiflex Trunk Voice and WAN
Network Interface Modules (NIMs) support data and voice
applications on the Cisco 4451-X integrated services routers. These
cards combine WAN-interface-card (WIC), voice-interface-card (VIC),
ISDN Primary Rate Interface (PRI), dial-access integration, and
channelized-data (CE1T1) functions to provide unparalleled
flexibility, versatility, and investment protection through their
many uses. Customers who choose to integrate data and voice in
multiple steps preserve their investment in a T1/E1 WAN interface.
The T1/E1 modules contain an onboard Cisco Packet Voice Digital
Signal Processor Module 4 (PVDM4) slot, which requires a
fourth-generation PVDM4 module. A PVDM4 on the T1/E1 module is
necessary for the voice features. The PVDM4 also provides for echo
cancellation of up to 128-ms echo-tail length for demanding network
conditions.
NIM-1MFT-T1/E1 Specification | |
Capacity | |
Serial data (channel-group) | 2 per port |
E1 unframed G.703 | Not supported |
Voice channel associated signaling (CAS) (ds0-group) | 24 per port (T1) |
31 per port (E1) | |
1 per timeslot | |
PRI (pri-group) | 1 per port |
Drop and insert | 24 per port (T1) |
(tdm-group) | 31 per port (E1) |
1 per timeslot | |
T1 Network Interface | |
Transmit bit rate | 1.544 Mbps ±50 bps/32 ppm |
Receive bit rate | 1.544 Mbps ±50 bps/32 ppm |
Line code | Alternate mark inversion (AMI) and binary 8-zero substitution (B8ZS) |
AMI ones density | Enforced for n x 56-kbps channels |
Framing format | D4 (Super Frame [SF]) and Extended Super Frame (ESF) |
Output level (line build-out [LBO]) | 0, -7.5 or -15 dB |
Input level | +1 dB0 down to -24 dB0 |
Data-terminal-equipment (DTE) interface (WIC mode) | Fractional service |
DTE interface (VIC mode) | G.704 or structured |
Data-communications-equipment (DCE) interface | G.704 or structured |
E1 Network Interface | |
Transmit bit rate | 2.048 Mbps ±100 bps/50 ppm |
Receive bit rate | 2.048 Mbps ±100 bps/50 ppm |
Data rate | 1.984 Mbps (framed mode) per E1 port |
Clocking | Internal and loop (recovered from network) |
E1 national bits | Fixed (nonconfigurable) |
Encoding | High-density bipolar three (HDB3) |
DTE interface (WIC mode) | Fractional service |
DTE interface (VIC mode) | G.704 or structured |
DCE interface | G.704 or structured |
Module Specifications | |
Dimensions (H x W x D) | 1.25 x 3.50 x 7.24 in. (3.18 x 8.89 x 18.39 cm) |
Environmental | ● Operating temperature: 0 to 50°C (32 to 122°F) |
● Storage temperature: -20 to +65°C (-4 to 148°F) | |
● Relative humidity: 10 to 85% noncondensing operating; 5 to 95% noncondensing, nonoperating | |
T1 Compliance (partial list) | ● TIA-968-A |
● CS-03 | |
● Jate | |
● ANSI T1.403 | |
E1 Compliance (partial list) | ● TBR4, TBR12, and TBR13 |
● ITU-T G.703, G.704, G.823, and I.431 | |
● S016 (Australia) | |
Weight | 0.40 lb (181g) |
You can insert the Cisco T1/E1 NIMs into the NIM slot on the
supported Cisco 4000 Integrated Services Routers (ISRs). In
addition to the features listed in Table 1, these modules support
both T1 and E1, providing additional flexibility for supporting T1,
fractional T1, E1, and fractional E1 for both voice and WAN
applications simultaneously. All modules include the
drop-and-insert multiplexing capability, which eliminates costly
external third-party channel service units/data service units
(CSUs/DSUs) and drop-and-insert multiplexers.
The fourth-generation Cisco T1/E1 NIMs add improvements over the
Cisco Second- and Third-Generation T1/E1 Multiflex Trunk Voice and
WAN Interface Cards (MFT VWIC2s and VWIC3s, respectively). The
fourth-generation T1/E1 modules enable each port to be clocked from
an independent clock source for data applications. Voice
applications can now be clocked independently from data
applications, with all ports for voice applications clocked from a
single source.
The T1/E1 modules contain an onboard Cisco Packet Voice Digital
Signal Processor Module 4 (PVDM4) slot, which requires a
fourth-generation PVDM4 module. A PVDM4 on the T1/E1 module is
necessary for the voice features. The PVDM4 also provides for echo
cancellation of up to 128-ms echo-tail length for demanding network
conditions. Refer to Table 2 for all configuration options offered
with the modules.
These fourth-generation modules also provide increased port density
per chassis compared to the Cisco Integrated Services Routers
Generation 2 (ISR G2) platform.
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